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The [[Cylons (RDM)|Cylon's]] transformation into [[Cylon agent|humanoid form]] introduces serious problems for the remnant of humanity known as [[The Fleet (RDM)|the Fleet]] to identify Cylon operative from human.
{{plausible speculation}}


This article details plausible speculation on central and supporting characters in ''[[Battlestar Galactica (RDM)|Battlestar Galactica]]'' who, based on their behavior, motive, and background, could be a Cylon agent.
:''Note: This article is protected from edits and kept around as an archive of the speculation that took place before the reveal of the final Cylon. See also [[Humanoid Cylon speculation/ColdBoot]] for another such page.''


=Needed Qualifiers for Speculation=
The [[Cylons (RDM)|Cylon]] evolution into twelve distinct [[Humanoid Cylon|humanoid models]] introduced a serious problem for the remnants of humanity in the [[The Fleet (RDM)|Fleet]]. Early into the search for [[Earth]], it seemed that anyone could be a Cylon, raising doubt and suspicion within the human populace ("[[Tigh Me Up, Tigh Me Down]]").


For a character to be logically considered a possible agent, there are a few established parameters to meet:
Fans of the show are rife with speculation about who could be a Cylon infiltrator in the Fleet. Viewers were introduced to the "[[Significant Seven]]" over the course of the miniseries and the first two season, but the nature of each of these characters was revealed shortly after that character's introduction.


* '''The suspect must not have any adult children or siblings.''' For purposes of this article, a pregnancy can be generally established as a disqualifier.  With [[Sharon Valerii (Caprica copy)|one exception]], Cylon agents have extreme difficulty with human sexual reproduction to the point of effectively infertility.<ref>During a discussion of the reproductive intentions of Cylons in [[The Farm#Noteworthy Dialogue|The Farm]]:<br>
In season three the speculation by both characters and fans turned to the [[Final Five]], enigmatic, almost-mystical figures who seem to have a [[The Temple of Five|link]] to ancient Colonial history. The nature of the five, according to [[Ron D. Moore|Moore]], is "fundamentally different" from the other seven models<ref>{{cite_rdm_podcast|episode=Frak Party Q and A|act=|id=ffdifferent|timestamp=19:05|totalrunning=78:27}}</ref>.  
'''Starbuck''': So farms, that’s great. What were they gonna do? Knock me up with some Cylon kid?<br>'''Sharon''': They were gonna try to. We haven’t been successful so far.<br>'''Anders''': Supposedly they can’t reproduce. You know biologically. So they have been trying every which way to produce offspring.</ref> If a character has adult, biological children, it automatically excludes them as being a Cylon agent as the procreation of the child and the age of the child both violate the 2nd qualifier.  Although humanoid Cylons have, eventually, proven to be capable of reproduction with humans, the birth of the hybrid child [[Hera]] was considered such a seminal event by the Cylons that it seems safe to conclude that no Cylon ever had a child before that point. 
* '''The suspect must not have a verifiable family history''' (other than marriage).  A parent would known their child from birth (unless otherwise specified), and Cylons are not copies of prexisting humans.  This is an expansion of the "confirmed character history" point below.
* '''The suspect cannot be confirmed to have witnessed or participated in the [[Cylon War]].'''  This is another expansion of the "confirmed character history" point; the Cylons definitely didn't have humanoid models during the First Cylon War{{citation needed}}, so if someone is confirmed to have participated in the war 40 years ago, that person is not a Cylon, e.g. William Adama and Saul Tigh.
* '''The suspect does not have a reliable history''' involving direct association (i.e. working or personal relationship) with a confirmed human character for '''more than 2 years prior''' to the destruction of the Colonies.


Based on information from the [[Miniseries]], the Cylon agents began their infiltration and integration into Colonial society approximately 2 years before the [[Fall of the Twelve Colonies]]. If a character has a direct association with a character that cannot be a Cylon agent, that association excludes them since they are older than the stated time that the agents began to integrate themselves into Colonial society. Note that the 2-year period is based on information given by [[Number Six]] to [[Gaius Baltar]]: Their relationship lasted for 2 years prior to the Cylon attack. There is also supporting information that [[Sharon Valerii (Galactica copy)|Boomer's]] tour of duty in the Colonial Fleet was also approximately 2 years.
At the conclusion of "[[Crossroads, Part II]]" four recurring characters are revealed to be Cylons. The revelation that long standing characters such as Colonel [[Saul Tigh|Tigh]] and Chief [[Galen Tyrol|Tyrol]] are Cylons blows the field wide open; if they could be "[[toaster]]s," then ''anyone'' could be the last Cylon. In particular, Tigh has a long and well-documented character history dating back to the first [[Cylon War]].


According to [[Ron D. Moore]], the twelve humanoid models are based on human behavior and personality archetypes distilled into twelve varieties. '''Cylon agents are NOT copies or clones of any pre-existing humans, living or dead:'''  In an October 24th, 2005 [http://www.thefandom.com/Article50.phtml podcast interview] Ron Moore stated that:
This article details [[Battlestar Wiki:Citation Jihad#Derived content|plausible speculation]] on which of the central and supporting characters in ''[[Battlestar Galactica (RDM)|Battlestar Galactica]]'' could be the final one.


:"The idea is not there was one like an original human model that they were copied from. The idea was that these were...these models of Cylon were developed out of their own study of us. The Cylons on some level looked at humanity and said, 'Well, you know what, there's really only twelve of you...and these are the twelve.' And then if you look at them, they kind of represent different archetypes of what humanity is."
==Clues from Official Sources==
During a Q&A session on the official Sci Fi channel Battlestar Galactica forum Ronald D. Moore notes that he already knows who the last Cylon is, and that he's already left clues as to who it is<ref>[http://forums.scifi.com/index.php?showtopic=2270103&st=0&p=3041263&#entry3041263 20 Answers - SCI FI FORUMS] Retrieved 03-27-2007</ref>.


Moore and the writers could always, of course, change their minds about anything not specifically established within the canon if needed. There is even precedent for retconning facts established within the canon itself, such as the amount of time remaining in the President's term (between [[Bastille Day]] and [[Lay Down Your Burdens, Part I]]) or the number of prisoners held aboard the [[Astral Queen]] (between the [[Miniseries]] and [[Bastille Day]].) Nonetheless, based on the qualifiers yet established, each assessment below is marked accordingly with their probability of being a Cylon infiltrator.
[[Bradley Thompson]] was asked when the writers knew the identity of the final five:
:"Four of the five were recent. If memory serves, the fifth (which may change) we've been kicking around since about the end of Season One."<ref>[[Battlestar Wiki:Official Communiques/Archive8#Identity of the Final Five|BW:OC#Identity of the Final Five]]</ref>


=Suspected Cylon infiltrators=
==General factors for consideration==
==High probability of being a Cylon==
In terms of narrative, to prevent an anti-climax it seems likely that the final Cylon would probably need to be a more prominent character than those of the Four. This centers the spotlight in the central "human" characters ([[Roslin]], [[William Adama|William]] and [[Lee Adama]], [[Gaius Baltar|Baltar]] and [[Kara Thrace|Starbuck]]). However, there is still half a season for characters to develop and gain significance with viewers.
=== James "Jammer" Lyman? ===
* Known siblings or adult children: No
* Known family members: No
* Confirmed to have lived during the Cylon War: No
* Association with known disqualifing character: No
* '''Chances of being a Cylon:''' High 


[[James Lyman|James "Jammer" Lyman‎]] has exhibited suspicious actions numerous times. Along with [[Cally]] and [[Socinus]], he serves under Chief [[Galen Tyrol|Tyrol]] on the [[hangar deck]].  Jammer consistently makes remarks that seem to be trying to divide the humans against each other. When it was revealed to the Fleet that Cylons now can look like humans in "[[Litmus]]", he kept arguing that everyone should stop trusting each other and that it was "every man for himself now", while Socinus said that if they didn't trust each other they wouldn't survive. Cally even pointed out that Jammer's kind of thinking is ''exactly'' what the Cylons want:  for everyone to become suspicious and paranoid. Jammer keeps doing this through the second season:  when Tyrol is accused of being a Cylon in "[[Resistance (episode)|Resistance]]" he immediately yells at Cally that the Chief must be a Cylon. Whenever Jammer appears he seems to be trying to sow mistrust among the crew.  Also, he told the emotionally unstable Cally that she should be angry at "Boomer" (the first Sharon Valerii copy) not himself, for Tyrol's being suspected, and that she should take it up with Boomer. Jammer can then be seen as having manipulated Cally into killing Boomer (Cally need not be a Cylon; Jammer could tell she was suffering from post-traumatic stress after Kobol and that she would go after Boomer if he suggested it to her).
With the Final Five being "fundamentally different" from the Seven, extrapolating any characteristics we learned of Cylons from the Seven (including physiology, loyalty or self-awareness) is of questionable validity.  


Two of the biggest pieces of evidence against Jammer appear in the episode, "[[Valley of Darkness]]."
Colonel Tigh has a well documented history stretching back at least to the first Cylon War. Also considering the [[Temple of Five]] it seems Final Five Cylons somehow significantly pre-date the Seven.


#Apollo and his group of marines found Jammer hiding in a small arms locker, completely unharmed, although the room was littered with the corpses of crewmen the Cylons had killed.  He claims to have just hid then snuck inside, but perhaps he was already there and the Centurions spared him because they knew he was a Cylon as well. [[Anastasia Dualla]] was also found alive in a room filled with dead crewmen, but she was in the lavatory, which isn't a vital area of the ship, while Jammer was in a small arms locker.  Further, Dualla was wounded; she had a light concussion and presumably a Centurion knocked her unconscious, assumed she was dead, and moved on.  Jammer was just standing around inside of the weapons locker.
It has been seen that Cylons can start families, however it is unclear how the Five came to exist. Having known natural parents would ''seem'' to preclude one being any more than half-Cylon.
#Before the fight to protect [[Aft Damage Control]], Captain Adama says a phrase of his father's: "Sometimes you have to roll the hard six." Jammer asks what this means, and Adama explains. To date, no aired episode explains where [[Sharon Valerii (Caprica copy)|Caprica-Valerii]], a known agent, learns of this phrase, which she uses in a pressing situation in her efforts to defend ''Galactica'' in "[[Flight of the Phoenix]]." Unwittingly, it is plausible that Valerii's knowledge of this phrase (and its origin) came from Jammer via the vague but tangible collective knowledge database of the Cylon agents. However, it is also plausible that [[Sharon Valerii (Galactica copy)|Galactica-Valerii]] heard this phrase sometime prior to her memories being copied into Caprica-Valerii.


Jammer continues to exhibit pessimistic, counterproductive, and morale-draining behavior.  When Chief [[Galen Tyrol|Tyrol]] was trying to construct the [[Blackbird]], he vocally tried to convince the other deckhands that it couldn't be done and it wasn't worth trying. He may have done this to undermine the military assets of ''Galactica'':  the Cylons may be hoping to wear down ''Galactica's'' Viper numbers through gradual attrition, while because the Cylons have dedicated manufacturing capabilities for Raiders on the [[Cylon homeworld]] and possibly on basestars, Raiders are easily replaceable.  With this in mind, the last thing the Cylons would want is for ''Galactica'' to start constructing her own replacement fighters ([[Flight of the Phoenix]]).
Of the 11 so far there have been only four female models. The final Cylon being female would serve to equalize this gender bias.


Jammer's suspicious behavior extends through the first two [[webisodes]], as he talks with [[Tucker Clellan|Duck]] about the proposed [[New Caprica Police]].  To Duck's disgust at the notion, Jammer replys "Some people say it's a good thing...  Get the Centurions off the streets, let us patrol them ourselves," tentatively advocating the Cylons' agenda.  Of course, this statement is ambiguous, as Jammer is ostensibly "feeling out" Duck for recruitment into Tyrol and Tigh's resistance cell, so his pro-Cylon idea could just be a tactic to draw Duck's opinion out further.
The [[first Hybrid]] gives a monologue about his knowledge of the Final Five in the extended version of "[[Razor]]". It states that the fifth Cylon, which is still in shadow, will come toward the light, hungering for redemption which will only come in the howl of terrible suffering.


Jammer also advises Tyrol not to be angry about Duck's refusal to join and to give up on recruiting him. Jammer balks at hiding weapons in the [[temple]] on [[New Caprica]] as well, although he is overruled by Tigh. Later on, he rails against Tigh for his callous attitudes toward the innocents killed at the temple after the Cylons stormed it to seize the weapons. He is brought in for questioning by [[Aaron Doral]] at a Cylon detention center, much to Tigh's concern. However, while in the detention center he exhibits genuine fear and anxiety, indicating that if he is a Cylon agent then he is not aware of it.
With the exception of [[Karl Agathon]] and [[Cally Tyrol]], who are confirmed to have half-Cylon, half-human children<ref>{{cite_rdm_podcast|episode=Frak Party Q and A|act=|id=hybridnick|timestamp=22:41|totalrunning=78:27}}</ref>, any "human" character could be a Cylon.


==Moderate probability of being a Cylon==
In "[[Revelations]]," [[Number Three (Downloaded copy)|D'Anna Biers]], mentions that there are only four of them ''in the Fleet''. If this is true, then this would narrow the field to those characters who are on the rebel basestar at the time, characters previously assumed dead or missing, or other [[#More Esoteric ideas|more esoteric suggestions]]. However, it is uncertain if the statement can be taken so literally. The characters who are on ''Galactica'' or other ships of the Fleet include Lee Adama and Kara Thrace, while Laura Roslin, William Adama and Gaius Baltar are on the Cylon baseship at that time {{TRS|Revelations}}. An alternative interpretation of "in the Fleet" could refer to loyalty and/or self-identity rather than physical presence; Number Three could have been telepathically aware that one (i.e., [[Tory Foster]]) had embraced her Cylon identity, thus leaving four others still loyal to humanity.
===Anastasia "Dee" Dualla?===
* Known siblings or adult children: No
* Known family members: No
* Confirmed to have lived during the Cylon War: No
* Three-year or longer association with disqualifing character: Unknown
* '''Chances of being a Cylon:''' Moderate


[[Anastasia Dualla|Dualla]] seems to have a fairly well developed backstory regarding her past; she is a Sagittaron ([[Bastille Day]]), her father disapproved of her joining the military ([[Final Cut]]), but upon closer inspection none of this can be confirmed by a third party:  the only source of information about Dualla's past in the series has been Dualla herself.  Dualla's position in charge of ''Galactica's'' communications puts her in an ideal position for subversion.  In "[[Valley of Darkness]]", Dualla is found in the enlisted head, having suffered a blow to the head from Cylon Centurions that passed through.  The Centurions killed everyone else, and it does seem plausible that one merely swiped her in the head, knocking her out, and thus thought she was dead and moved on.  However, it still seems odd that she was the only survivor.  In addition, Number Six later demonstrated in "[[Downloaded]]" how she was willing to physically damage herself in order to manipulate ''Galactica''-Sharon's sympathy:  perhaps Dualla hit ''herself'' in the head, to fake an injury, thus throwing suspicion off of herself.  Dualla started a relationship with President Roslin's aide, Billy Keikeya, possibly to gain a foothold in the president's office, and then began a relationship with Lee Adama, CAG of ''Galactica'' and son of the military commander of the entire fleet.  Eventually, Apollo was promoted to ''Pegasus'' commander and Dualla left ''Galactica'' to marry him and become his XO, further insinuating herself into the command structure.
==Main Characters==


=== Felix Gaeta? ===
===[[Laura Roslin]]===
* Known siblings or adult children: No
[[Image:Laura_Roslin_promo.jpg|right|90px]]
* Known family members: No
The colonies' president has been unquestionably a boon to humanity's search for earth, indeed the two times she has been removed from office have been the two greatest setbacks in the journey.
* Confirmed to have lived during the Cylon War: No
* Association with known disqualifing character: Yes (William Adama)
Roslin has also experienced prophetic dreams and visions (those induced by [[chamalla]], and a dream she shared with the Cylons [[Caprica-Six]] and {{callsign|Athena}}). She fits very well the profile of the [[Sacred Scrolls|scroll's]] dying leader, the scrolls also having links to other more mystical elements of the series, including the [[Temple of Five]].
* '''Chances of being a Cylon:'''  Moderate


Lt. [[Felix Gaeta]] is in a good position for a Cylon—not conspicuous but nonetheless in a position where he can help the Cylons quite a bit. Gaeta arguably seems to hand something to Boomer in "[[Kobol's Last Gleaming, Part II]]" before she shoots Adama (a frame by frame analysis shows that their hands are not in frame dispite the camera intentionally panning down when he shakes her hand, leaving the question unanswered). However, he did not hand her a gun, because pilots always carry sidearms, and she walked into CIC with it.  Gaeta can recognize Cylon devices, and is close to [[Gaius Baltar|Dr. Baltar]]. He admitted to ignoring the Cylon device installed on his console in the [[miniseries]], explaining that he thought it was unimportant. Gaeta has plotted coordinates to a water planet, a Cylon [[tyllium]] base, and [[Kobol]] with uncanny accuracy. He "forgot" to send updated [[emergency jump coordinates]] to the fleet in "[[Scattered]]", leaving ''Galactica'' vulnerable to Cylon electronic attack after having to network the ship [[Computers|computer]] systems together. In "[[Lay Down Your Burdens, Part II]]" Gaeta helps the Cylon cause by uncovering the ballot tampering which leads to the election of Gaius.
However her dying nature, from an aggressive form of breast cancer is also the biggest cause to doubt Roslin being a Cylon. It is unknown whether the Final Five can succumb to cancer, but Cylons seem to be generally tougher than humans. Baltar's cure in "[[Epiphanies]]" was probably designed based on the assumption that Roslin's physiology is human.


Gaeta's recent behavioral changes from the stress of working at evading the Cylons shows by "[[Final Cut]]" as Gaeta is shown in his interview drunk, smoking, and wearing a new tattoo. By the following episode, "[[Flight of the Phoenix]]", Gaeta angrily snaps at Colonel Tigh for giving a difficult order, causing surprise throughout [[CIC]] since Gaeta is normally a calm, reserved officer even under the worst of conditions. Contrast this behavior with Boomer, the ''Galactica'' copy of Sharon Valerii, who still appeared quite alert after 5 continuous days of combat status. Note the following dialogue from the first regular series episode, "[[33]]":
===[[William Adama]]===
[[Image:William_Adama_promo.jpg|right|90px]]
If William Adama were revealed to be a Cylon, it would be one of the biggest shocks the series could produce. Overall Adama appears to epitomize a very human set of strengths and weaknesses. Nevertheless, he does experience hallucinations in the fifth [[Razor Flashback]], although he sees and hears people in his environment instead of seeing himself in a different one. The experience could also be explained by stress or other factors, however.


::'''[[Lee Adama|Apollo]]''': Hey, how about you, Boomer? [[Cottle|Doc]] tells me you're holding up better than anybody in the squadron.
The Adama family is well documented. His father, [[Joseph Adama]], was known to [[Romo Lampkin]]. The proposed spin-off ''[[Caprica (series)|Caprica]]'', will feature the history of the Adama family, including a young William. This may be difficult to square with any revelation about William Adama being a Cylon.  
::'''Boomer''': I'm tired, like everybody else.
{{spoiltext|A robotic duplicate of William Adama's sibling [[Tamara Adama]] is one of the first Cylons (''[[Caprica (series)|Caprica]]''). It is not entirely implausible that William Adama could be a similar construct, although these forms of Cylon prototypes are unknown and unlikely to be humanoid.}}
::'''Apollo''': You never seem it.
William Adama experiences guilt for actions he believe may have triggered the war {{TRS|Hero}}. This could be the "hungering for redemption" that the [[First Hybrid]] talks about (see above).
::'''[[Kara Thrace|Starbuck]]''': 'Cause she's a Cylon.
::'''Boomer''': You're just gonna make me come over there and kick your ass, aren't you?


While even Cylon agents develop severe behavioral and physiological issues after extended work and abuse ([[Number Six#Gina|Pegasus]]), Cylon agents appear to be more resilient than humans, which may limit the likelihood of Gaeta's possible Cylon connection. On the other hand, if he were a Cylon, Gaeta's human personality may have finally been overtaxed by that time, suggesting that an actual human might have snapped earlier in their exodus in contrast.
===[[Lee Adama]]===
[[Image:Lee_Adama_promo.jpg|right|90px]]
Could Lee's chronic angst be partly due to guilt at his Cylon nature? Was the [[Leoben]] who said "Adama's a Cylon" {{TRS|Tigh Me Up, Tigh Me Down}} referring to Lee? (Note: The writers hadn't decided on the identity of the final Cylon at that point. Moreover, if Adama were a member of the Final Five, Leoben would not know this.) He might project in "[[Resurrection Ship, Part II]]," although this is more likely an oxygen deprivation induced hallucination.


In the end, Gaeta's likelihood as a Cylon operative may be in doubt over one key element: The Cylons appear to have integrated human agents into the Colonies no earlier than 2 years before the events of the Miniseries. Gaeta has served on ''Galactica'' with Commander Adama for three years ([[Miniseries]]). Since humanoid Cylons are not clones of actual humans, the likelihood of Gaeta as a Cylon agent would depend on the start of Cylon agent introduction.
The posting of his then-wife [[Anastasia Dualla]] as ''Pegasus''{{'|s}} executive officer, despite her lack of seasoning and non-qualification as an aviator, while presumably mitigating the concerns about a junior having undue influence with the commander, also mirrors the placement of ''Galactica''{{'|s}} XOs: Colonel [[Saul Tigh]], a Cylon is romantically involved with a Six, and Captain [[Karl Agathon]] is married to an Eight.


=== Ellen Tigh? ===
Lee Adama is told that he is "a son trying to flee his father's shadow" by [[Romo Lampkin]]. This conceivably could link with the description of the final Cylon as "still in shadow, drawn toward the light."
* Known siblings or adult children: None
* Known family members: None
* Confirmed to have lived during the Cylon War: Yes (character over age 40)
* Three-year or longer association with disqualifing character: Seven-year marriage to [[Saul Tigh]]
* '''Chances of being a Cylon:'''  Low to Moderate


In light of her statistic-defying survival of the Cylon holocaust and her manipulations of her husband during Commander [[William Adama]]'s incapacitation ([[Scattered]] through [[Resistance (episode)|Resistance]]), [[Ellen Tigh]]'s actions have demonstrated the possibility that she may be a Cylon agent. For someone who seems so intelligent and far-sighted, she should be well aware that pushing her husband to strong-arm the rest of the Fleet to conform with his (and her) views would only end in chaos.  If she ''is'' a Cylon looking to destroy the Fleet from within, then the best weapon in her arsenal is the man she's married to.  
In his defense, Lee is also a member of the well-documented Adama family. A "switched at birth" scenario could explain this, as could the "fundamental differences" between the Final Five and the Significant Seven.


In an October 2005 webcast, [[Ronald D. Moore]] indicated that the likelihood of Ellen Tigh being a Cylon was low. Essentially, this was due to the feeling that having her be a Cylon agent would not only be convenient, but unrealistic from a story point-of-view as well. Moore's comments don't eliminate Ellen Tigh from consideration, but reduces the likelihood of this speculation. Some viewers surmise that Moore may have meant that revealing Tigh as a Cylon in her [[Tigh Me Up, Tigh Me Down|debut episode]] in addition to the character's many other complexities, would stretch the overall believability or integrity of the character at that point, but that he was not refering to her actual status as a Cylon or not at the time.
===[[Gaius Baltar]]===
[[Image:Gaius_Baltar_promo.jpg|right|90px]]
{{mainarticle|Baltar as Cylon speculation}}
Baltar's vast intelligence, weak character and lack of loyalty to anyone but himself have made him ultimately humanity's (unwitting) betrayer. Baltar himself longs to be a Cylon as this would absolve himself, however comes to the conclusion that he is human after all. Baltar certainly has a lot to be guilty about, whether he has enough of a conscience to be truly "hungering for redemption" is questionable, however his confession to Roslin seems to indicate that this is the case {{TRS|The Hub}}.


Ellen Tigh's celebrated her seventh wedding anniversary with Saul Tigh in a [http://www.scifi.com/battlestar/episodes/season01/112/deleted1.html deleted scene] from the episode "[[Kobol's Last Gleaming, Part I]]". If the canonicity of this scene stands, then Ellen's likelihood of being an agent drops dramatically. Else, the establishment of their wedding "date" should aid in increasing or reducing speculation on this intriguing character.
There are good reasons to suspect Baltar. He exhibits vast intelligence that may be superhuman in nature. His [[Virtual Six]], her precognitive abilities, and the apparently projected environments they often co-experience are suspicious, as well as the fact that both Virtual Six and later the [[Hybrid]] tell him that he is "chosen".


In the preview clip for "[[Occupation]]", Ellen is shown having sex with a Cavil, in exchange for her husband's release for captivity. This, on the surface, would seem to be the firmest possible evidence that Ellen is not, in fact, a Cylon. However, it has not firmly been established that Cylons do not have sex amongst themselves for pleasure; and even if they do not, this incident might simply be a ploy to further cement her position (such as it is) among the human population. (Ironically enough, this incident of infidelity is probably the nicest, most-spouselike thing Ellen has done for Tigh since her arrival.)
In [[Caprica-Six]]'s final vision in "[[Crossroads, Part II]]" she sees the hooded figures of the final five staring at her from the upper level. Baltar is standing next to her in the vision as well.


==Low probability of being a Cylon==
===[[Kara Thrace]]===
===Gaius Baltar?===
[[Image:Kara_Thrace.jpg|right|90px]]
* Known siblings or adult children: None
{{seealso|The Destiny}}
* Known family members: None
Kara Thrace's path towards her destiny has involved many strange, perhaps supernatural events. Whether this destiny involves her being a Cylon is a matter of speculation (indeed members of the [[Significant Seven]], who do not know who the Final Five are, tell her that she has this destiny), but it is certain there is ''something'' special about Thrace herself.
* Confirmed to have lived during the Cylon War: No
* Three-year or longer association with disqualifying character: No
* '''Chances of being a Cylon:''' Very low 


There is very low chance that [[Gaius Baltar]] is actually a Cylon. He has been a prominent public figure for years.  Number Six earnestly wanted to have a hybrid child with him as the biological father and her as the biological mother, but had to change her plans to ''considering'' [[Hera]] to be "their child" even though it is not biologically theirs. Cylons talking amongst themselves in "[[Downloaded]]" continually referred to Baltar as a human.  
Certainly Thrace exhibits phenomenal natural skill as a pilot, and manages to learn to fly a [[Cylon Raider (RDM)|Raider]] exceptionally quickly {{TRS|You Can't Go Home Again}}. From childhood, Thrace has been drawing the mandala from the [[Temple of Five]]. However she was also physically abused as a child and still carries the scars; Cylons seem to be more robust than humans and possibly may not carry such long-term injuries. The same may be said of the knee injury which put a stop to Thrace's [[Pyramid (RDM)|Pyramid]] playing ambitions.


To review a detailed breakdown of the whys and whatfors of the possibility of Baltar as a Cylon, see [[Baltar as Cylon speculation]]
Most strikingly, the ace pilot apparently dies in "[[Maelstrom]]" but returns ([[Resurrection (RDM)|resurrected]]?) in "[[Crossroads, Part II]]". Furthermore, not being on ''Galactica'' at the time, Thrace is the only major "human" character who has a reason for not reacting to the [[The Music|music]] which, to the "four," reverberates around the ship. However the final Cylon may, for some reason, not have heard it, or may have ignored it.


=== Bell? ===
Thrace has engaged in combat with [[Raider (RDM)|Raiders]] on many occasions without any incident similar to the one which occurs between Anders and the Raider during the [[Battle of the Ionian Nebula]], however it is possible that the Raider was only able to identify Anders because he had already been "activated".
* Known siblings or adult children: No
* Known family members: No
* Confirmed to have lived during the Cylon War: No
* Association with known disqualifing character: No
* '''Chances of being a Cylon:'''  Low


D'anna Biers' [[Bell|cameraman/assistant]] is another possible candidate for a Cylon infiltrator, as he has been shown willingly taking part in the same devious and manipulative activities as D'anna Biers ([[Final Cut]]).  Whether he is a Cylon working in tandem with Biers, or just a nosy human journalist following his superior’s equally devious wishes has yet to be determined.
[[Katee Sackhoff]] was apparently told she is not a Cylon<ref>[http://img175.imageshack.us/img175/8547/redeye3copyci7.jpg See this magazine cutting.]</ref>.
{{spoilli|According to [http://roadrunnerdm.livejournal.com/84288.html this source] as of "[[Sometimes a Great Notion]]," Kara Thrace believes herself to be a Cylon, whilst Katee Sackhoff believes otherwise.}}


Bell's speculation as a Cylon agent is questionable based on some of his actions in "Final Cut." When he is free of D'anna Biers, he doesn't film sensitive, if seemingly trivial, data. He overlooks the carbon dioxide scrubbers (a potential Cylon infiltrator target). In addition, instead of filming the [[hangar deck]] after the destruction of the two [[Raider]]s, Bell focuses on Apollo's post-flight check. Since Bell has not been seen in the series since this episode, the lack of further appearances all but eliminates the likelihood for this character to be a Cylon agent.
===None of the above?===
[[Image:Battlestar Galactica Last Supper.jpg|thumb|right|300px|"The Last Supper"]]
{{seealso|The Last Supper}}
The January 2008 edition of [[w:Entertainment Weekly|Entertainment Weekly]] showcases a two-page photo of the cast for [[Season Four]] posed in a manner similar to Leonardo DaVinci's ''[[w:The Last Supper (Leonardo)|The Last Supper]]'' with an explanation of each character's pose/position provided by Ron Moore.  Near the far left of the table a space is left vacant and a cup sits on the table marking the absent character's intended place. Moore tells EW that "We have not yet revealed the final [unknown] Cylon." and when asked if there was a possibility that the final Cylon was indeed ''not'' seated at the table Moore notes "You ferreted that out pretty slyly.  I didn't really want to give that away."<ref>{{cite_news|first=|last=|url=http://community.livejournal.com/battlestar_blog/814818.html#cutid1|title=What does this picture mean? Try to crack the 'BSG' code.|publisher=Entertainment Weekly|page=40, 41|date=January 11, 2008|accessdate=English|language=}}</ref> William Adama, Laura Roslin, Lee Adama, Gaius Baltar, and Kara Thrace are all present in the picture, as are [[Final Five]] Cylons Saul Tigh, Galen Tyrol, and Samuel Anders.


===Tory Foster?===
However, the importance of this photo is seriously put to question given [[Aaron Douglas]]' comments on the photo. According to the actor, he was unsure that Moore had anything to do with the photo, given that Moore was not present for the shoot. Additionally, the photo shoot had at least six different setups and the actors had changed places during the photo shoot, thus contending that there is no hidden meaning for the photo.<ref>{{cite_web|url=http://community.livejournal.com/aarondouglas/55289.html|title=The Chief's Deck: BSG Last Supper Photo|date=8 January 2008|accessdate=9 January 2009|last=|first=|format=|language=}}</ref>  Moore, however, later explicitly confirmed that the final Cylon is not in the picture.
* Known siblings or adult children: No
* Known family members: No
* Confirmed to have lived during the Cylon War: No
* Three-year or longer association with disqualifing character: No
* '''Chances of being a Cylon:'''  Low to Moderate


[[Tory Foster]]'s past is unconfirmed, and she seemed eager to work her way into President Roslin's administration.  The odds that another aide with skills like Billy Keikeya would also happen to be alive in the Fleet is also tenuous.
==Others==


===Cally Henderson===
===[[Tom Zarek]]===
* Known siblings or adult children: No
* Known family members: No
* Confirmed to have lived during the Cylon War: No
* Three-year or longer association with disqualifing character: Unknown
* '''Chances of being a Cylon:'''  Low to None


[[Cally Henderson Tyrol|Cally]] shot Boomer in a "Jack Ruby-style" assassination, preventing the Fleet from interrogating her further.  While this might benefit the Cylon agenda, Cally had a perfectly understandable reason for doing it, which she has openly stated: she hated Boomer for what she did to Chief Tyrol, hated her for betraying all of their trust and shooting Adama, and simply because she was a Cylon.  Indeed, many other characters in "[[Flight of the Phoenix]]" ''congratulate'' Cally and say they would have done the same given the chance.  Little can be confirmed about Cally's past, but this has not pointed to any Cylon origin.  Finally, Cally has given birth to Tyrol's child [[Nicholas Tyrol|Nicholas]] as of season 3, meaning it is impossible for them both to be Cylons and improbable in the extreme that either of them is.
[[Image:Zarek.jpg|right|90px]]
Based upon the mutterings of the Hybrid in "Razor," as well as Ron Moore's claim that he has already left clues to the final Cylon, one could assume Tom Zarek is the last Cylon to be found.  


=== Billy Keikeya? ===
Tom Zarek likes to move from second-line positions, is not big on being in charge but always craving to be noticed and understood, is constantly trying to make people understand why he did the things he spent time in jail for, and has the "cleanest" past (no known relatives, etc.). His criminal background and political ambitions fit with someone "hungering for redemption."
* Known siblings or adult children: No
* Known family members: No
* Confirmed to have lived during the Cylon War: No
* Three-year or longer association with disqualifing character: No
* '''Chances of being a Cylon:'''  Low


[[Billy Keikeya]] might also be a Cylon due to the relative lack of confirmation surrounding his character.  In a deleted scene in the Miniseries, it is revealed that Roslin met Billy for the first time when she boarded Colonial One to travel to Galactica; thus he presence can only be "confirmed" immediately before the attack, far short of even the 2 years that Number Six and Boomer had infiltrated the Colonies.  Virtually nothing can be confirmed about Billy; although he states in the Miniseries that his parents and siblings were living on Picon when it was nuked, we really only have his word for it and no way to confirm that these were actual facts.  Everyone just takes Billy's word for it.  Billy has also stated (in deleted scenes in "[[Home, Part II]]") that he is an atheist.  Again, he could simply be behaving  based on implanted false memories that form a fake personality crafted by the Cylons, and it would be an ironic twist if an atheist character was revealed to belong to a race of religious zealots.  That being said, the most recently revealed Cylon agent, [[Cavil]], also exhibits atheistic or agnostic tendencies, explicitly stating that "there is no [[God]]" when interrogated by Roslin and Adama.
===[[Anastasia Dualla]]===


Billy could be a Cylon that was sent to keep tabs on Laura Roslin during the attack; Roslin was a viable target due to her status as a high-ranking government official.  In an interesting deleted scene in "[[Fragged]]" Billy appears in one of Roslin's dreams as a manifestation of her own doubts and fears. In the dream he antagonistically taunts her for her faith in the [[Sacred Scrolls]] and [[Kara Thrace]] then stabs her in the heart with a knife after which she wakes up screaming in terror.  Given the prophetic connotations of Roslin's previous dreams and visions this could ''possibly'' be taken as evidence for Keikeya being a Cylon, however like most deleted material its canonicity is tentative at best.
[[Image:Anastasia_Dualla.jpg|right|90px]]
Her first name "Anastasia" is the feminine form of "Anastasius," ancient Greek for "resurrection".<ref>[http://www.behindthename.com/name/anastasia Behindthename.com "Anastasia" ]</ref><ref>[http://www.behindthename.com/name/anastasius Behindthename.com "Anastasius"]</ref> Her surname "Dualla" may be derived from Latin word ''Dualis'', from which originates the English words "dual" and "duality," such as a Cylon living as a human - or a Sagittaron serving as a soldier {{TRS|The Woman King}}.


The character of Billy Keikeya dies in the episode, "[[Sacrifice]]." As only Cylon agents can "return from the dead," the argument for Keikeya as a Cylon agent is effectively invalid unless the character appears in a present-time (non-flashback) episode of the series, which would confirm Keikeya's true nature.
The rejection of her people's pacifism and her failure to reconcile with her father over their final heated argument {{TRS|Final Cut}} allude to the redemption angle.


===Galen Tyrol?===
At the time of the initial Cylon attack, she immediately threw herself at the [[Billy Keikeya|special assistant to the president]] and promptly developed a romantic relationship with him. Despite having never undertaken the years of formal military education of a colonial officer, she managed to maneuver herself to receive a commission and a vital posting as the [[executive officer]] of ''[[Pegasus (RDM)|Pegasus]]'', and to become become related by marriage to both the military and (later) civilian leadership of the Fleet. Her posting as ''Pegasus''{{'|s}} XO, despite her lack of seasoning and non-qualification as an aviator <ref>To the extent that BSG incorporates real-world naval concepts and traditions, an aircraft carrier's (i.e. a battlestar's) CO and XO would customarily be qualified aviators.</ref> while presumably mitigating the concerns about a junior having undue influence with the commander (her husband), also mirrors the placement of ''Galactica''{{'|s}} XOs: Colonel [[Saul Tigh]] is a Final Five Cylon and romantically involved with a Six, and Captain [[Karl Agathon]] is married to an Eight.
* Known siblings or adult children: No
* Known family members: No
* Confirmed to have lived during the Cylon War: No
* Three-year or longer association with disqualifing character: Yes (William Adama)
* '''Chances of being a Cylon:'''  Low to None


Chief [[Galen Tyrol]] was in an illicit relationship with Boomer, and later had recurring nightmares based on his fear that he might also be a Cylon sleeper agent.  However, he has served under William Adama on ''Galactica'' for 5 years, and as Adama put it, had he been a Cylon and they wanted the ship to be destroyed, he more than knew how to do it, and should have ''already'' done it by this point. Tyrol and Cally's child, born as of season 3, all but removes suspicion for this character (love does allow human-Cylon pregnancies to occur, however).
She is the by far the most prominent "human" remaining who is not of substantially (real-world Earth) European ethnicity. Edward James Olmos wears blue contact lenses to portray Admiral Adama as non-Hispanic, and {{callsign|Hot Dog}} (portrayed by Olmos's son, [[Bodie Olmos]]) and [[Felix Gaeta]] (portrayed by Italian [[Alessandro Juliani]]) are very ''blanco'' Hispanics if not European. All other prominent non-European characters are either dead or Cylons: East Indian [[Rekha Sharma]] as Cylon [[Tory Foster]], African [[Rick Worthy]] as Cylon [[Number Four]] / [[Simon]], Korean [[Grace Park]] as Cylon [[Number Eight|Number Eight / Sharons]], African [[Lorena Gale]] as the late [[Elosha]], and Eurasian [[Lily Duong-Walton]] & [[Alexandra Thomas]] as the half-Cylon [[Hera Agathon]]. In this day and age, it seems unlikely that the writers would make ''all'' of the prominent "ethnics" who are allowed to live be Cylons.


=Characters who cannot possibly be Cylons=
===[[Felix Gaeta]]===
The following characters, for individual reasons below, have been disproven from any possibility of being humanoid Cylon sleeper agents. 


===Lee "Apollo" Adama===
[[Image:Felix_Gaeta.jpg|right|90px]]
* Known siblings or adult children: Yes, with qualifier (See "[[Black Market]]")
After [[Anastasia Dualla]], Gaeta is the most prominent character not depicted in the Last Supper photograph. His double-agent (or, implied by Baltar and Sweet Eight, ''triple''-agent) cross-collaboration on New Caprica, his perjury at Baltar's trial, and his morphine addiction all leave him seeking redemption.
* Known family members: Yes ([[William Adama]], [[Zak Adama]])
* Confirmed to have lived during the Cylon War: No
* Three-year or longer association with disqualifing character: Yes (William Adama)
* '''Chances of being a Cylon:'''  None


In "[[Flesh and Bone]]", a copy of [[Leoben Conoy]], a Cylon agent, grabs [[Laura Roslin]] and tells her, "Adama is a Cylon," prior to his execution. If his statement is true, it leaves doubt on which Adama he is talking about, although Roslin's actions in the next episode, "[[Tigh Me Up, Tigh Me Down]]", indicate that she believes Conoy spoke of Commander Adama.
A counterargument against Gaeta, however, is analogous to that against Dualla. Whereas Dualla is the most prominent member of a racial or ethnic minority still depicted as alive and presumably human, Gaeta is the most prominent sexual minority so depicted.  His former<ref>''See'' writer commentary to "[[The Face of the Enemy]]" webisode 10, which states that Gaeta ends his relationship with Hoshi at the webisode's conclusion.</ref> lover, [[Louis Hoshi]], is a very minor character, Admiral [[Helena Cain]] is dead, and all other known gays/bisexuals are or were Cylons ([[Gina Inviere]], [[Caprica-Six]] and[[Number Three (Downloaded copy)|Downloaded Three]]).


Cylon agents are not copies (clones) of existing people. Evidence from [[Sharon Valerii]]'s and [[Number Six]]'s conversations indicate that humanoid Cylon infiltration began no earlier than 2 years prior to the events of the [[Miniseries]], although their respective backstories may suggest they have been "alive" for many years. As Lee Adama was alive long before this introduction, and his father knew him since he was born and can thus confirm this, the probability that Lee Adama is a Cylon is as low as that of his father.
=== [[Sharon Valerii|Sharon "Boomer" Valerii]] ===


Information from the episode, "[[Black Market]]" suggests that Adama was to be a father to a child he conceived on Caprica, but he left the unborn child's mother, his lover at the time. Such a pregnancy, if Lee Adama was indeed an agent, would introduce the ability of Cylon ''males'' to sire children (currently, episodes only show that it is possible for a Cylon ''female'' to conceive).
[[Image:Sharon.PNG|right|90px]]
Sharon "Boomer" Valerii is a unique case, given that she has broken away from her model line by voting for the lobotomization of the [[Raider (RDM)|Raiders]], for the first time in Cylon history. Further, she has grown to disdain humanity as a result of what transpired on [[New Caprica]], and, while given the duty to take care of [[Hera Agathon]], she later attempts to kill Hera as she views the child as a mistake.  


''There are reports of fan fiction with stories involving [[Lee Adama]] as a Cylon. ''Battlestar Wiki'' does not post fan fiction (whole or in excerpts), or speculation generated by these stories. An article's content must (with [[Numerology|some]] [[Toaster|silly]], [[The Battlestar Galactica Drinking Game|non-sequitur]] [[Flashlight|exceptions]]) provide sufficient basis in fact or probability based on aired episode information or other official sources as described in the [[Battlestar Wiki:Citation Jihad]] project page.''
Valerii has since made it a point to go against the grain of Cylon society, inciting a [[Cylon Civil War|civil war]] and accompanies [[Cavil]] to the [[Resurrection Hub]] to resurrect [[Number Three (Downloaded copy)|Number Three]] in the attempt to stop it. Further, she satisfies many of the pre-existing conditions, including:


===William Adama===
# Having been around since Season 1<ref>It should be noted that her "Cylon" nature was a last minute decision in the Miniseries. Further, she is continually at odds with her programming and her defective nature has yet been seen in other Cylon models.</ref>.
* Known siblings or adult children: Yes ([[Lee Adama]] and [[Zak Adama]])
# She is not present in the Last Supper photo.
* Known family members: Yes ([[Caroline Adama]] and [[Anne Adama]])
# Valerii is a major character.
* Confirmed to have lived during the Cylon War: Yes (widely-known Veteran)
# Three is the first to see Valerii and is aware of her existence. Three's quip at Eights always going to something "shiny" may be an attempt to test her. Also, Three does not kill Valerii after snapping Cavil's neck, suggesting that Three either did not desire her to come to harm or was unconcerned about her fate. Further, Valerii does escape the Hub prior to its destruction per the [[Podcast:The Hub|podcast]] for "[[The Hub]]".
* Three-year or longer association with disqualifing character: Yes (Saul Tigh)
# If the [[First Hybrid]] is correct, the Last Cylon is clawing for redemption. Valerii has much that she may be redeemed for, including her various murder attempts (namely [[William Adama]] and Hera Agathon), and her failure to bring about peaceful coexistence with the humans and the Cylon race.
* '''Chances of being a Cylon:''' None


Of all the suspected infiltrators, the case against [[William Adama]] appears to be the weakest.
Like the four known members of the Final Five, Valerii was ignorant of her Cylon nature.


In the Miniseries, Adama seems to know that the Cylon agents have "silica relays" in their brains, and that they would be affected by the storm around [[Ragnar Anchorage]]. This knowledge is not explained, but the [[Number Five]] copy left on the station showed signs of being affected, whereas Adama did not. In "[[Tigh Me Up, Tigh Me Down]]", Commander Adama disappears mysteriously and returns with Ellen Tigh. Around the same time, a Cylon Raider shows up. However, this was all explained later in the same episode, when Adama reveals that he was reluctant to openly announce Ellen's sudden appearance because he was afraid she could be a Cylon.
The only downside to this theory is that Valerii is part of the [[Number Eight]] model line. However, given that the Final Five are "fundamentally different," this yet to be explained fundamental difference may be able to explain this. Further, none of the Final Five have model numbers, and are thus outside the Significant Seven's mainstream; the Five may have infiltrated Cylon society as well in some way, just the same way Tigh and the others were able to infiltrate human society dating back to at least 30 years pre-[[Fall of the Twelve Colonies|Fall]].


Adama also has exhibited strange behavior, from expressing vague Cylon sympathies (both in his speech in the Miniseries and in his discussion with Tyrol in "[[Home, Part I]]" where he seems to concede that Boomer was more than a machine). While not openly friendly to the Cylons, Adama seems to at least respect them as persons in that he does not treat the Caprica copy of Sharon Valerii inhumanely (despite an attempt at strangling her when they first met), despite what was done to him by the Valerii copy known as "Boomer". While this could indicate a Cylon nature, it's also extremely likely that Adama's strength of character and personality enable him to think that Valerii might actually have changed.
===[[Virtual beings]]===


William Adama is the father of two children, [[Lee Adama|Lee]] and [[Zak Adama|Zak]]. Before the conception of Valerii's hybrid child the Cylons have been unable to produce children through sexual reproduction. Further, Adama is, by all accounts, a veteran of the well-documented [[Cylon War]], back at a time where Cylons were purely mechanical and not biosynthetic.
The virtual beings (possibly including the [[virtual Leoben]]) may actually be a single entity, the final Cylon being more spiritual than corporal. Virtual Six claims to be an angel from the Cylon God, which could be roughly correlated with the "the five priests devoted to the one whose name cannot be spoken" from [[Pythia]]. The overall actions of these beings seem to be neither pro-Cylon or pro-human, which fits with the Final five being a third party in the dynamic of the battle.


When the recent revelation by Ron Moore that Cylon agents are unique beings and not copies of existing humans is added to this, the likelihood of William Adama as a suspected infiltrator could be all but ruled out. This also throws the validity of Leoben Conoy's final words to Roslin accusing Adama as a Cylon in "[[Flesh and Bone]]" into question (which were almost certainly meant to just spread paranoia).
None of the other final five have shown similar characteristics to this, and there is no particular reason to suggest the final Cylon is greatly different from his or her four "siblings". When Number Three sees her vision of the final five in the [[Opera House]] (a vision repeated for other characters, thus not simply in her mind) they are five humanoid figures in white robes, at least one of which is known to her.


The strongest convincing evidence against Adama as a Cylon is that we have seen flashbacks of Adama and Saul Tigh set 20 years prior to the destruction of the Colonies, after the first Cylon War. Since Cylon agents aren't copies of humans, it is not possible for Adama (or Tigh) to be Cylon operatives (at least of the type used thus far).
===More Esoteric ideas===


===Karl "Helo" Agathon===
The final Cylon is
* Known siblings or adult or hybrid children: Yes ([[Hera]])
*on [[Earth (RDM)|Earth]] or the entire population of Earth are copies of the last Cylon.
* Known family members: No
*dead.
* Confirmed to have lived during the Cylon War: No
*a deceased character known to the audience.
* Three-year or longer association with disqualifing character: Unknown
*[[God (RDM)|God]] or some other divine entity.  Note that [[God_%28RDM%29#Official_statements|an early draft of the Season 1 cliffhanger]] was to depict [[Virtual Six]] taking Baltar to see, not the hybrid infant as was ultimately filmed, but [[Dirk Benedict]] as [[God_%28RDM%29#Official_statements|God]].
* '''Chances of being a Cylon:''' None
*a single, somehow distinct, copy of a known Cylon - such as Boomer, analyzed above.
*one of the [[Hybrid]]s.
*a character to be featured in ''[[Caprica (series)|Caprica]]'' such as [[Zoe Graystone]] or [[Tamara Adama]].


[[Karl Agathon|Helo]] fathers a Cylon-human hybrid, [[Hera]], with a known Cylon agent, [[Sharon Valerii (Caprica copy)|Sharon Valerii]]. As Cylon males cannot sire children with Cylon females (per data from "[[The Farm]]"), Helo cannot realistically be a Cylon himself.
==References==
 
{{reflist}}
===Samuel Anders===
* Known siblings or adult children: No
* Known family members: No
* Confirmed to have lived during the Cylon War: No
* Three-year or longer association with disqualifing character: Unknown (Was Pyramid Ball player but not known for how long)
* '''Chances of being a Cylon:'''  None
 
As the leader of an anti-Cylon resistance movement on Cylon-occupied Caprica, [[Samuel Anders|Anders]] stands small chance of actually being a Cylon.  He was a well known public figure as a sports star, though this might have only happened recently.  In "[[Downloaded]]", while he is unconscious [[Number Three]] and [[Number Six]] refer to him between themselves as a human.
 
===Helena Cain===
* Known siblings or adult children: No
* Known family members: No
* Confirmed to have lived during the Cylon War: No
* Three-year or longer association with disqualifing character: Yes (William Adama)
* '''Chances of being a Cylon:'''  None
 
Admiral [[Helena Cain]] may have been ruthless and a danger to the Fleet, but she was a publicly known figure for years.  Cain spent years rapidly rising through the ranks all the way up to Admiral. Adama has personally witnessed this rise, which must have taken longer than the 2 year cutoff for likely Cylon agent infiltration as defined in this article.
 
===Laura Roslin===
* Known siblings or adult children: No
* Known family members: No
* Confirmed to have lived during the Cylon War: Yes (character over age 40)
* Three-year or longer association with disqualifing character: Yes (President [[Richard Adar]])
* '''Chances of being a Cylon:'''  None
 
President [[Laura Roslin]] may have prophetic moments, like [[Number Six]] and [[Leoben Conoy]], but she cannot possibly be a Cylon.  Roslin was a public figure for 20 years ([[Litmus]]), working with later-President Adar and eventually serving as Secretary of Education:  her past is totally confirmed.  Cylon agents appear to be resistant to cancer, and Roslin was dying of cancer until she was cured by a blood transfusion from the Cylon-Human hybrid foetus ([[Epiphanies]]).
 
===Kara "Starbuck" Thrace===
* Known siblings or adult children: No
* Known family members: Yes (alluded to in "[[The Farm]]" by [[Simon]])
* Confirmed to have lived during the Cylon War: No
* Three-year or longer association with disqualifing character: Yes, with qualifier (the Adama family)
* '''Chances of being a Cylon:'''  None
 
[[Kara Thrace|Starbuck]] has been disproven from being a Cylon:  [[Simon]] wanted to use Starbuck's egg cells in Cylon/Human hybrid experiments, and it would be totally illogical for him to need to hold her against her will to obtain her genetic material, if the Cylons already have hundreds of copies of a Starbuck-model Cylon to obtain it from.  Starbuck's incarceration in a Cylon [[Farms|Farm]] disqualifies her from being a Cylon.  Further, reproduction between humanoid Cylons is impossible, and Starbuck would not have been captured for use in human-Cylon hybrid experiments if she was not human.
 
A further disqualification may come from how long she has known Lee or William Adama, based on her relationship with Zak.  She has known them at least two years, the time between the funeral and the Cylon attack ([[Miniseries]]).
 
===Saul Tigh===
* Known siblings or adult children: No
* Known family members: None
* Confirmed to have lived during the Cylon War: Yes (widely-known Veteran)
* Three-year or longer association with disqualifing character: Yes (William Adama)
* '''Chances of being a Cylon:''' None
 
[[Saul Tigh]] is well known as a veteran of the first Cylon War, and has served as a non-obscure officer in the Fleet for decades.  In many respects the case against Saul Tigh being a Cylon is similar to that of William Adama's (above). 
 
The strongest convincing evidence against Tigh as a Cylon is that we have seen flashbacks of Tigh and William Adama set 20 years prior to the destruction of the Colonies, after the first Cylon War. Since Cylon agents aren't copies of humans, it is not possible for Tigh or Adama to be Cylon operatives (at least of the type used thus far).
 
===Tom Zarek===
* Known siblings or adult children: No
* Known family members: No
* Confirmed to have lived during the Cylon War: Yes
* Three-year or longer association with disqualifing character: Yes (President Adar, publicly known to be held in prison for 20 years)
* '''Chances of being a Cylon:'''  None
 
[[Tom Zarek]] may seem subversive to the status quo of the Fleet and opposed to President Roslin's administration, but he can't be a Cylon.  Zarek has been a well-known terrorist/political dissident for decades.  He is widely known for blowing up a government building on Sagittaron, leading to his arrest 20 years ago, and he was presumably a prominent Sagittaron leader for years beforehand.  President Adar publicly offered him amnesty if he would renounce his campaign of violence to free Sagittaron and Zarek refused.  Due to being such a publicly known figure for so many decades before the Cylon Attack, Zarek could not be a Cylon.
 
=References=
<div style="font-size:85%"><references/></div>


[[Category:A to Z]]
[[Category:A to Z]]

Latest revision as of 05:07, 21 February 2024

This article is based on plausible speculation, which can violate policies on fan-generated theories if analysis is taken too far.


Note: This article is protected from edits and kept around as an archive of the speculation that took place before the reveal of the final Cylon. See also Humanoid Cylon speculation/ColdBoot for another such page.

The Cylon evolution into twelve distinct humanoid models introduced a serious problem for the remnants of humanity in the Fleet. Early into the search for Earth, it seemed that anyone could be a Cylon, raising doubt and suspicion within the human populace ("Tigh Me Up, Tigh Me Down").

Fans of the show are rife with speculation about who could be a Cylon infiltrator in the Fleet. Viewers were introduced to the "Significant Seven" over the course of the miniseries and the first two season, but the nature of each of these characters was revealed shortly after that character's introduction.

In season three the speculation by both characters and fans turned to the Final Five, enigmatic, almost-mystical figures who seem to have a link to ancient Colonial history. The nature of the five, according to Moore, is "fundamentally different" from the other seven models[1].

At the conclusion of "Crossroads, Part II" four recurring characters are revealed to be Cylons. The revelation that long standing characters such as Colonel Tigh and Chief Tyrol are Cylons blows the field wide open; if they could be "toasters," then anyone could be the last Cylon. In particular, Tigh has a long and well-documented character history dating back to the first Cylon War.

This article details plausible speculation on which of the central and supporting characters in Battlestar Galactica could be the final one.

Clues from Official Sources[edit]

During a Q&A session on the official Sci Fi channel Battlestar Galactica forum Ronald D. Moore notes that he already knows who the last Cylon is, and that he's already left clues as to who it is[2].

Bradley Thompson was asked when the writers knew the identity of the final five:

"Four of the five were recent. If memory serves, the fifth (which may change) we've been kicking around since about the end of Season One."[3]

General factors for consideration[edit]

In terms of narrative, to prevent an anti-climax it seems likely that the final Cylon would probably need to be a more prominent character than those of the Four. This centers the spotlight in the central "human" characters (Roslin, William and Lee Adama, Baltar and Starbuck). However, there is still half a season for characters to develop and gain significance with viewers.

With the Final Five being "fundamentally different" from the Seven, extrapolating any characteristics we learned of Cylons from the Seven (including physiology, loyalty or self-awareness) is of questionable validity.

Colonel Tigh has a well documented history stretching back at least to the first Cylon War. Also considering the Temple of Five it seems Final Five Cylons somehow significantly pre-date the Seven.

It has been seen that Cylons can start families, however it is unclear how the Five came to exist. Having known natural parents would seem to preclude one being any more than half-Cylon.

Of the 11 so far there have been only four female models. The final Cylon being female would serve to equalize this gender bias.

The first Hybrid gives a monologue about his knowledge of the Final Five in the extended version of "Razor". It states that the fifth Cylon, which is still in shadow, will come toward the light, hungering for redemption which will only come in the howl of terrible suffering.

With the exception of Karl Agathon and Cally Tyrol, who are confirmed to have half-Cylon, half-human children[4], any "human" character could be a Cylon.

In "Revelations," D'Anna Biers, mentions that there are only four of them in the Fleet. If this is true, then this would narrow the field to those characters who are on the rebel basestar at the time, characters previously assumed dead or missing, or other more esoteric suggestions. However, it is uncertain if the statement can be taken so literally. The characters who are on Galactica or other ships of the Fleet include Lee Adama and Kara Thrace, while Laura Roslin, William Adama and Gaius Baltar are on the Cylon baseship at that time (TRS: "Revelations"). An alternative interpretation of "in the Fleet" could refer to loyalty and/or self-identity rather than physical presence; Number Three could have been telepathically aware that one (i.e., Tory Foster) had embraced her Cylon identity, thus leaving four others still loyal to humanity.

Main Characters[edit]

Laura Roslin[edit]

The colonies' president has been unquestionably a boon to humanity's search for earth, indeed the two times she has been removed from office have been the two greatest setbacks in the journey.

Roslin has also experienced prophetic dreams and visions (those induced by chamalla, and a dream she shared with the Cylons Caprica-Six and Sharon "Athena" Agathon). She fits very well the profile of the scroll's dying leader, the scrolls also having links to other more mystical elements of the series, including the Temple of Five.

However her dying nature, from an aggressive form of breast cancer is also the biggest cause to doubt Roslin being a Cylon. It is unknown whether the Final Five can succumb to cancer, but Cylons seem to be generally tougher than humans. Baltar's cure in "Epiphanies" was probably designed based on the assumption that Roslin's physiology is human.

William Adama[edit]

If William Adama were revealed to be a Cylon, it would be one of the biggest shocks the series could produce. Overall Adama appears to epitomize a very human set of strengths and weaknesses. Nevertheless, he does experience hallucinations in the fifth Razor Flashback, although he sees and hears people in his environment instead of seeing himself in a different one. The experience could also be explained by stress or other factors, however.

The Adama family is well documented. His father, Joseph Adama, was known to Romo Lampkin. The proposed spin-off Caprica, will feature the history of the Adama family, including a young William. This may be difficult to square with any revelation about William Adama being a Cylon.

Spoiler follows, highlight to read.
A robotic duplicate of William Adama's sibling Tamara Adama is one of the first Cylons (Caprica). It is not entirely implausible that William Adama could be a similar construct, although these forms of Cylon prototypes are unknown and unlikely to be humanoid.

William Adama experiences guilt for actions he believe may have triggered the war (TRS: "Hero"). This could be the "hungering for redemption" that the First Hybrid talks about (see above).

Lee Adama[edit]

Could Lee's chronic angst be partly due to guilt at his Cylon nature? Was the Leoben who said "Adama's a Cylon" (TRS: "Tigh Me Up, Tigh Me Down") referring to Lee? (Note: The writers hadn't decided on the identity of the final Cylon at that point. Moreover, if Adama were a member of the Final Five, Leoben would not know this.) He might project in "Resurrection Ship, Part II," although this is more likely an oxygen deprivation induced hallucination.

The posting of his then-wife Anastasia Dualla as Pegasus's executive officer, despite her lack of seasoning and non-qualification as an aviator, while presumably mitigating the concerns about a junior having undue influence with the commander, also mirrors the placement of Galactica's XOs: Colonel Saul Tigh, a Cylon is romantically involved with a Six, and Captain Karl Agathon is married to an Eight.

Lee Adama is told that he is "a son trying to flee his father's shadow" by Romo Lampkin. This conceivably could link with the description of the final Cylon as "still in shadow, drawn toward the light."

In his defense, Lee is also a member of the well-documented Adama family. A "switched at birth" scenario could explain this, as could the "fundamental differences" between the Final Five and the Significant Seven.

Gaius Baltar[edit]

Main article: Baltar as Cylon speculation

Baltar's vast intelligence, weak character and lack of loyalty to anyone but himself have made him ultimately humanity's (unwitting) betrayer. Baltar himself longs to be a Cylon as this would absolve himself, however comes to the conclusion that he is human after all. Baltar certainly has a lot to be guilty about, whether he has enough of a conscience to be truly "hungering for redemption" is questionable, however his confession to Roslin seems to indicate that this is the case (TRS: "The Hub").

There are good reasons to suspect Baltar. He exhibits vast intelligence that may be superhuman in nature. His Virtual Six, her precognitive abilities, and the apparently projected environments they often co-experience are suspicious, as well as the fact that both Virtual Six and later the Hybrid tell him that he is "chosen".

In Caprica-Six's final vision in "Crossroads, Part II" she sees the hooded figures of the final five staring at her from the upper level. Baltar is standing next to her in the vision as well.

Kara Thrace[edit]

See also: The Destiny

Kara Thrace's path towards her destiny has involved many strange, perhaps supernatural events. Whether this destiny involves her being a Cylon is a matter of speculation (indeed members of the Significant Seven, who do not know who the Final Five are, tell her that she has this destiny), but it is certain there is something special about Thrace herself.

Certainly Thrace exhibits phenomenal natural skill as a pilot, and manages to learn to fly a Raider exceptionally quickly (TRS: "You Can't Go Home Again"). From childhood, Thrace has been drawing the mandala from the Temple of Five. However she was also physically abused as a child and still carries the scars; Cylons seem to be more robust than humans and possibly may not carry such long-term injuries. The same may be said of the knee injury which put a stop to Thrace's Pyramid playing ambitions.

Most strikingly, the ace pilot apparently dies in "Maelstrom" but returns (resurrected?) in "Crossroads, Part II". Furthermore, not being on Galactica at the time, Thrace is the only major "human" character who has a reason for not reacting to the music which, to the "four," reverberates around the ship. However the final Cylon may, for some reason, not have heard it, or may have ignored it.

Thrace has engaged in combat with Raiders on many occasions without any incident similar to the one which occurs between Anders and the Raider during the Battle of the Ionian Nebula, however it is possible that the Raider was only able to identify Anders because he had already been "activated".

Katee Sackhoff was apparently told she is not a Cylon[5].

None of the above?[edit]

"The Last Supper"
See also: The Last Supper

The January 2008 edition of Entertainment Weekly showcases a two-page photo of the cast for Season Four posed in a manner similar to Leonardo DaVinci's The Last Supper with an explanation of each character's pose/position provided by Ron Moore. Near the far left of the table a space is left vacant and a cup sits on the table marking the absent character's intended place. Moore tells EW that "We have not yet revealed the final [unknown] Cylon." and when asked if there was a possibility that the final Cylon was indeed not seated at the table Moore notes "You ferreted that out pretty slyly. I didn't really want to give that away."[6] William Adama, Laura Roslin, Lee Adama, Gaius Baltar, and Kara Thrace are all present in the picture, as are Final Five Cylons Saul Tigh, Galen Tyrol, and Samuel Anders.

However, the importance of this photo is seriously put to question given Aaron Douglas' comments on the photo. According to the actor, he was unsure that Moore had anything to do with the photo, given that Moore was not present for the shoot. Additionally, the photo shoot had at least six different setups and the actors had changed places during the photo shoot, thus contending that there is no hidden meaning for the photo.[7] Moore, however, later explicitly confirmed that the final Cylon is not in the picture.

Others[edit]

Tom Zarek[edit]

Based upon the mutterings of the Hybrid in "Razor," as well as Ron Moore's claim that he has already left clues to the final Cylon, one could assume Tom Zarek is the last Cylon to be found.

Tom Zarek likes to move from second-line positions, is not big on being in charge but always craving to be noticed and understood, is constantly trying to make people understand why he did the things he spent time in jail for, and has the "cleanest" past (no known relatives, etc.). His criminal background and political ambitions fit with someone "hungering for redemption."

Anastasia Dualla[edit]

Her first name "Anastasia" is the feminine form of "Anastasius," ancient Greek for "resurrection".[8][9] Her surname "Dualla" may be derived from Latin word Dualis, from which originates the English words "dual" and "duality," such as a Cylon living as a human - or a Sagittaron serving as a soldier (TRS: "The Woman King").

The rejection of her people's pacifism and her failure to reconcile with her father over their final heated argument (TRS: "Final Cut") allude to the redemption angle.

At the time of the initial Cylon attack, she immediately threw herself at the special assistant to the president and promptly developed a romantic relationship with him. Despite having never undertaken the years of formal military education of a colonial officer, she managed to maneuver herself to receive a commission and a vital posting as the executive officer of Pegasus, and to become become related by marriage to both the military and (later) civilian leadership of the Fleet. Her posting as Pegasus's XO, despite her lack of seasoning and non-qualification as an aviator [10] while presumably mitigating the concerns about a junior having undue influence with the commander (her husband), also mirrors the placement of Galactica's XOs: Colonel Saul Tigh is a Final Five Cylon and romantically involved with a Six, and Captain Karl Agathon is married to an Eight.

She is the by far the most prominent "human" remaining who is not of substantially (real-world Earth) European ethnicity. Edward James Olmos wears blue contact lenses to portray Admiral Adama as non-Hispanic, and Brendan "Hot Dog" Costanza (portrayed by Olmos's son, Bodie Olmos) and Felix Gaeta (portrayed by Italian Alessandro Juliani) are very blanco Hispanics if not European. All other prominent non-European characters are either dead or Cylons: East Indian Rekha Sharma as Cylon Tory Foster, African Rick Worthy as Cylon Number Four / Simon, Korean Grace Park as Cylon Number Eight / Sharons, African Lorena Gale as the late Elosha, and Eurasian Lily Duong-Walton & Alexandra Thomas as the half-Cylon Hera Agathon. In this day and age, it seems unlikely that the writers would make all of the prominent "ethnics" who are allowed to live be Cylons.

Felix Gaeta[edit]

After Anastasia Dualla, Gaeta is the most prominent character not depicted in the Last Supper photograph. His double-agent (or, implied by Baltar and Sweet Eight, triple-agent) cross-collaboration on New Caprica, his perjury at Baltar's trial, and his morphine addiction all leave him seeking redemption.

A counterargument against Gaeta, however, is analogous to that against Dualla. Whereas Dualla is the most prominent member of a racial or ethnic minority still depicted as alive and presumably human, Gaeta is the most prominent sexual minority so depicted. His former[11] lover, Louis Hoshi, is a very minor character, Admiral Helena Cain is dead, and all other known gays/bisexuals are or were Cylons (Gina Inviere, Caprica-Six andDownloaded Three).

Sharon "Boomer" Valerii[edit]

Sharon "Boomer" Valerii is a unique case, given that she has broken away from her model line by voting for the lobotomization of the Raiders, for the first time in Cylon history. Further, she has grown to disdain humanity as a result of what transpired on New Caprica, and, while given the duty to take care of Hera Agathon, she later attempts to kill Hera as she views the child as a mistake.

Valerii has since made it a point to go against the grain of Cylon society, inciting a civil war and accompanies Cavil to the Resurrection Hub to resurrect Number Three in the attempt to stop it. Further, she satisfies many of the pre-existing conditions, including:

  1. Having been around since Season 1[12].
  2. She is not present in the Last Supper photo.
  3. Valerii is a major character.
  4. Three is the first to see Valerii and is aware of her existence. Three's quip at Eights always going to something "shiny" may be an attempt to test her. Also, Three does not kill Valerii after snapping Cavil's neck, suggesting that Three either did not desire her to come to harm or was unconcerned about her fate. Further, Valerii does escape the Hub prior to its destruction per the podcast for "The Hub".
  5. If the First Hybrid is correct, the Last Cylon is clawing for redemption. Valerii has much that she may be redeemed for, including her various murder attempts (namely William Adama and Hera Agathon), and her failure to bring about peaceful coexistence with the humans and the Cylon race.

Like the four known members of the Final Five, Valerii was ignorant of her Cylon nature.

The only downside to this theory is that Valerii is part of the Number Eight model line. However, given that the Final Five are "fundamentally different," this yet to be explained fundamental difference may be able to explain this. Further, none of the Final Five have model numbers, and are thus outside the Significant Seven's mainstream; the Five may have infiltrated Cylon society as well in some way, just the same way Tigh and the others were able to infiltrate human society dating back to at least 30 years pre-Fall.

Virtual beings[edit]

The virtual beings (possibly including the virtual Leoben) may actually be a single entity, the final Cylon being more spiritual than corporal. Virtual Six claims to be an angel from the Cylon God, which could be roughly correlated with the "the five priests devoted to the one whose name cannot be spoken" from Pythia. The overall actions of these beings seem to be neither pro-Cylon or pro-human, which fits with the Final five being a third party in the dynamic of the battle.

None of the other final five have shown similar characteristics to this, and there is no particular reason to suggest the final Cylon is greatly different from his or her four "siblings". When Number Three sees her vision of the final five in the Opera House (a vision repeated for other characters, thus not simply in her mind) they are five humanoid figures in white robes, at least one of which is known to her.

More Esoteric ideas[edit]

The final Cylon is

References[edit]

  1. Podcast: Frak Party Q and A , Seek to: 19:05. Total running time: 78:27.
  2. 20 Answers - SCI FI FORUMS Retrieved 03-27-2007
  3. BW:OC#Identity of the Final Five
  4. Podcast: Frak Party Q and A , Seek to: 22:41. Total running time: 78:27.
  5. See this magazine cutting.
  6. "What does this picture mean? Try to crack the 'BSG' code.", Entertainment Weekly, January 11, 2008, p. 40, 41. Retrieved on English.
  7. The Chief's Deck: BSG Last Supper Photo (backup available on Archive.org) (in ). (8 January 2008). Retrieved on 9 January 2009.
  8. Behindthename.com "Anastasia"
  9. Behindthename.com "Anastasius"
  10. To the extent that BSG incorporates real-world naval concepts and traditions, an aircraft carrier's (i.e. a battlestar's) CO and XO would customarily be qualified aviators.
  11. See writer commentary to "The Face of the Enemy" webisode 10, which states that Gaeta ends his relationship with Hoshi at the webisode's conclusion.
  12. It should be noted that her "Cylon" nature was a last minute decision in the Miniseries. Further, she is continually at odds with her programming and her defective nature has yet been seen in other Cylon models.