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Liam Sullivan: Difference between revisions

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{{Cast Data
| image=TOS - Actor - Liam Sullivan.jpg
| character=[[Planner]] (uncredited)
| series=TOS
| born_month=05
| born_day=18
| born_year=1923
| death_month=04
| death_day=19
| death_year=1998
| nationality=US
| imdb=0838217
| sortkey=Sullivan, Liam
| image2=Planner.jpg}}
'''William E. Liam Sullivan''' (18 May 1923―19 April 1998) was an American actor and singer, professionally credited as '''Liam Sullivan'''. He portrayed the primary [[Planner]], a [[Theta|Theta-class lifeform]], in {{OS|The Gun on Ice Planet Zero, Part II|prose=y}}, a role for which he was uncredited but later identified through computer-aided facial recognition.
Sullivan's television career spanned 46 years across more than 115 productions.<ref group="external" name="imdb_sullivan_filmography">{{cite web|url=https://www.imdb.com/name/nm0838217/|title=Liam Sullivan|publisher=IMDb|accessdate=23 January 2026}}</ref> His Romanesque features and precisely modulated voice made him ideally suited to portray smoothly roguish, arrogant or cynical characters, particularly in genre television.<ref group="external" name="imdb_sullivan_biography_features">{{cite web|url=https://www.imdb.com/name/nm0838217/bio/#:~:text=his%20Romanesque%20features%20and%20precisely%20modulated%20voice%20ideally%20suited%20to%20smoothly%20roguish%2C%20arrogant%20or%20cynical%20gents|title=Liam Sullivan - Biography|publisher=IMDb|accessdate=23 January 2026}}</ref> Sullivan's most notable genre television appearances include ''[[w:The Twilight Zone (1959 TV series)|The Twilight Zone]]'', ''[[w:Star Trek: The Original Series|Star Trek: The Original Series]]'', ''[[w:Logan's Run (TV series)|Logan's Run]]'', ''[[w:Lost in Space|Lost in Space]]'', and ''[[w:Voyage to the Bottom of the Sea (TV series)|Voyage to the Bottom of the Sea]]''.
== Early life and education ==
Sullivan was born William Edward Sullivan on 18 May 1923 in Jacksonville, Illinois.<ref group="external" name="imdb_sullivan_birth_info">{{cite web|url=https://www.imdb.com/name/nm0838217/bio/#:~:text=Liam%20Sullivan%20was%20schooled%20at%20Illinois%20College|title=Liam Sullivan - Biography|publisher=IMDb|accessdate=23 January 2026}}</ref> He was the son of Lee A. Sullivan Sr. (1889–1968) and Nell Sullivan (née Griffiths, 1891–1957).<ref group="external" name="findagrave_sullivan_memorial">{{cite web|url=https://www.findagrave.com/memorial/17088617/liam-sullivan#:~:text=Sullivan%20Family%20plot|title=Liam Sullivan (1923-1998)|publisher=Find a Grave|accessdate=23 January 2026}}</ref> His grandfather, W.E. Sullivan (1861–1932), founded the Eli Bridge Company, which built the innovative Big Eli Ferris Wheel in Jacksonville in May 1900.<ref group="external" name="imdb_sullivan_eli_bridge">{{cite web|url=https://www.imdb.com/name/nm0838217/bio/#:~:text=compiling%20a%20biographical%20history%20of%20the%20Eli%20Bridge%20Company%20who%20built%20the%20innovative%20%27Big%20Eli%27%20Ferris%20Wheel%20in%20Jacksonville%2C%20Illinois%20in%20May%201900|title=Liam Sullivan - Biography|publisher=IMDb|accessdate=23 January 2026}}</ref> The business remained in operation within the Sullivan family throughout his lifetime.<ref group="external" name="jacksonville_journal_eli_bridge">{{cite web|url=https://www.myjournalcourier.com/news/slideshow/10-things-you-may-not-know-about-Jacksonville-223148.php#:~:text=Liam%20Sullivan%20is%20the%20grandson%20of%20W.E.%20Sullivan%20who%20established%20the%20Big%20Eli%20Bridge%20Company%20and%20built%20Ferris%20Wheels|title=10 things you may not know about Jacksonville actor Liam Sullivan|author=Dominic Genetti|publisher=Jacksonville Journal-Courier|date=22 June 2021|accessdate=23 January 2026}}</ref>
Sullivan attended Jacksonville High School and Illinois College, where he had his first experience with acting in regional theater.<ref group="external" name="imdb_sullivan_illinois_college">{{cite web|url=https://www.imdb.com/name/nm0838217/bio/#:~:text=Liam%20Sullivan%20was%20schooled%20at%20Illinois%20College%20while%20having%20his%20first%20fling%20with%20the%20acting%20profession%20in%20regional%20theater|title=Liam Sullivan - Biography|publisher=IMDb|accessdate=23 January 2026}}</ref> He later studied drama at Harvard University before pursuing a professional acting career.<ref group="external" name="imdb_sullivan_harvard">{{cite web|url=https://www.imdb.com/name/nm0838217/bio/#:~:text=He%20then%20studied%20drama%20at%20Harvard|title=Liam Sullivan - Biography|publisher=IMDb|accessdate=23 January 2026}}</ref>
== Career ==
=== Stage work ===
Sullivan made his way to New York and first appeared on Broadway in ''The Constant Nymph'' in 1951.<ref group="external" name="imdb_sullivan_constant_nymph">{{cite web|url=https://www.imdb.com/name/nm0838217/bio/#:~:text=first%20appeared%20on%20Broadway%20in%20%22The%20Constant%20Nymph%22%20in%201951|title=Liam Sullivan - Biography|publisher=IMDb|accessdate=23 January 2026}}</ref> His Broadway career also included appearances in ''Merchant of Venice'' and the Mike Nichols production of ''The Little Foxes''.<ref group="external" name="variety_sullivan_obituary_broadway">{{cite web|url=https://variety.com/1998/legit/news/liam-sullivan-74-1117470562/#:~:text=Sullivan%27s%20Broadway%20career%20included%20%22The%20Constant%20Wife%2C%22%20%22Merchant%20of%20Venice%22%20and%20the%20recent%20Mike%20Nichols%20production%20of%20%22The%20Little%20Foxes|title=Liam Sullivan, 74|publisher=Variety|date=7 May 1998|accessdate=23 January 2026}}</ref> He later returned to the West Coast to perform in a Los Angeles stage production of ''Mary Stuart''.<ref group="external" name="imdb_sullivan_mary_stuart">{{cite web|url=https://www.imdb.com/name/nm0838217/bio/#:~:text=He%20later%20returned%20to%20the%20West%20Coast%20to%20perform%20in%20an%20LA%20stage%20production%20of%20%22Mary%20Stuart%22|title=Liam Sullivan - Biography|publisher=IMDb|accessdate=23 January 2026}}</ref>
=== Television ===
By the early 1950s, Sullivan began appearing in television roles.<ref group="external" name="imdb_sullivan_television_start">{{cite web|url=https://www.imdb.com/name/nm0838217/bio/#:~:text=By%20the%20early%201950s%2C%20he%20began%20appearing%20in%20television|title=Liam Sullivan - Biography|publisher=IMDb|accessdate=23 January 2026}}</ref> He became a familiar presence across all genres, from western to science fiction. Sullivan's only recurring television role was as Major Mapoy, the villainous cattle baron, in all 26 episodes of the ABC Western series ''The Monroes'' during the 1966–67 season.<ref group="external" name="imdb_sullivan_monroes">{{cite web|url=https://www.imdb.com/name/nm0838217/#:~:text=In%201966%E2%80%9367%20season%2C%20he%20appeared%20as%20Major%20Mapoy%20in%20all%20twenty%2Dsix%20episodes%20of%20the%20ABC%20Western%20series%20The%20Monroes|title=Liam Sullivan|publisher=IMDb|accessdate=23 January 2026}}</ref>
Sullivan's television credits included ''[[w:Star Trek|Star Trek]]'', ''[[w:The Twilight Zone (1959 TV series)|The Twilight Zone]]'', ''[[w:Dragnet (series)|Dragnet]]'', ''[[w:Hawaii Five-O|Hawaii Five-O]]'', ''[[w:Dallas (1978 TV series)|Dallas]]'', and ''[[w:L.A. Law|L.A. Law]]''.<ref group="external" name="variety_sullivan_tv_credits">{{cite web|url=https://variety.com/1998/legit/news/liam-sullivan-74-1117470562/#:~:text=TV%20credits%20included%20%22Star%20Trek%2C%22%20%22Twilight%20Zone%2C%22%20%22Dragnet%2C%22%20%22Hawaii%20Five%2DO%2C%22%20%22Dallas%22%20and%20%22L.A.%20Law|title=Liam Sullivan, 74|publisher=Variety|date=7 May 1998|accessdate=23 January 2026}}</ref> Among his many television credits, two stand out as particularly memorable: his sadistic philosopher-king Parmen in the ''Star Trek'' episode "Plato's Stepchildren", and his obnoxious social-climbing upstart Jamie Tennyson in ''The Twilight Zone'' episode "The Silence", who unwisely accepts a bet for a half-million dollars that he can remain silent for a year.<ref group="external" name="imdb_sullivan_notable_roles">{{cite web|url=https://www.imdb.com/name/nm0838217/bio/#:~:text=Among%20his%20many%20TV%20credits%20two%20stand%20out%20above%20all%3A%20his%20sadistic%20philosopher%2Dking%20Parmen%20from%20the%20Star%20Trek%20(1966)%20episode%20%22Plato%27s%20Stepchildren%22%2C%3B%20and%20his%20obnoxious%20social%2Dclimbing%20upstart%20Jamie%20Tennyson%20in%20%22The%20Silence%22%20(The%20Twilight%20Zone%20(1959))%20who%20unwisely%20accepts%20a%20bet%20for%20a%20half%2Dmillion%20dollars%20that%20he%20can%20remain%20silent%20for%20a%20year|title=Liam Sullivan - Biography|publisher=IMDb|accessdate=23 January 2026}}</ref>
In "Plato's Stepchildren", which aired on 22 November 1968, Sullivan played Parmen, a tyrannical leader of a small community of people with telekinetic abilities who decides he wants McCoy to stay against his will on the planet as their doctor.<ref group="external" name="imdb_star_trek_plato_cast">{{cite web|url=https://www.imdb.com/title/tt0708443/fullcredits/#:~:text=Liam%20Sullivan,Parmen|title=Star Trek: Plato's Stepchildren - Full cast & crew|publisher=IMDb|accessdate=23 January 2026}}</ref> The episode is historically significant for featuring television's first scripted interracial kiss between Captain [[Memoryalpha:James T. Kirk|Kirk]] and Lieutenant [[Memoryalpha:Uhura|Uhura]].


Sullivan appeared in another ''Twilight Zone'' episode, "The Changing of the Guard", in which he played the Headmaster who must deliver news to an aging teacher played by [[w:Donald_Pleasence|Donald Pleasence]].<ref group="external" name="imdb_sullivan_twilight_zone_headmaster">{{cite web|url=https://www.imdb.com/name/nm0838217/bio/#:~:text=Liam%20appeared%20in%20another%20Twilight%20Zone%20episode%2C%20%22The%20Changing%20of%20the%20Guard%22%2C%20but%20this%20time%20was%20overshadowed%20by%20Donald%20Pleasence|title=Liam Sullivan - Biography|publisher=IMDb|accessdate=23 January 2026}}</ref>


<!-- Please remove the {{inuse}} tag when you have finished editing the article! -->
In the ''Dragnet'' episode "The Big Prophet" (1968), Sullivan as his character Brother William, a thinly disguised portrayal of Timothy Leary, held forth for the entire half-hour on the benefits of LSD and marijuana while Joe Friday argued the opposing view.<ref group="external" name="imdb_sullivan_dragnet_brother_william">{{cite web|url=https://www.imdb.com/name/nm0838217/#:~:text=In%20the%20Dragnet%20episode%20%22The%20Big%20Prophet%22%20(1968)%2C%20Sullivan%20as%20his%20character%20Brother%20William%20(a%20thinly%20disguised%20portrayal%20of%20Timothy%20Leary)%20held%20forth%20for%20the%20entire%20half%2Dhour%20on%20the%20benefits%20of%20LSD%20and%20marijuana%20while%20Joe%20Friday%20argued%20the%20opposing%20view|title=Liam Sullivan|publisher=IMDb|accessdate=23 January 2026}}</ref>
{{inuse}}


{{Cast Data
Sullivan's other science fiction television appearances included playing Nexus in the ''Lost in Space'' episode "His Majesty Smith", scientist Anthony Sterling in the ''Voyage to the Bottom of the Sea'' episode "Leviathan", and an appearance in the ''Logan's Run'' television series.<ref group="external" name="imdb_sullivan_scifi_appearances">{{cite web|url=https://www.imdb.com/name/nm0838217/#:~:text=He%20portrayed%20Patrick%20Henry%20in%20the%20Daniel%20Boone%20episode%20%22Love%20and%20Equity%22%2C%20scientist%20Anthony%20Sterling%20in%20the%20Voyage%20to%20the%20Bottom%20of%20the%20Sea%20episode%20%22Leviathan%22%2C%20Nexus%20in%20the%20Lost%20in%20Space%20episode|title=Liam Sullivan|publisher=IMDb|accessdate=23 January 2026}}</ref>
| image=  
 
| character=
Sullivan often portrayed villains throughout his acting career. He once stated: "Playing truly evil people is a great way to release tension and anger and disgust with humanity. Show bad people what they really look and act like and maybe they'll recognize themselves and change. Who knows?"<ref group="commentary" name="imdb_sullivan_villain_quote">{{cite web|url=https://www.imdb.com/name/nm0838217/bio/#:~:text=Playing%20truly%20evil%20people%20is%20a%20great%20way%20to%20release%20tension%20and%20anger%20and%20disgust%20with%20humanity.%20Show%20bad%20people%20what%20they%20really%20look%20and%20act%20like%20and%20maybe%20they%27ll%20recognize%20themselves%20and%20change.%20Who%20knows%3F|title=Liam Sullivan - Biography|publisher=IMDb|accessdate=23 January 2026}}</ref>
| series=TOS
 
| born_month=  
=== Film ===
| born_day=  
 
| born_year=  
Sullivan's film work included ''[[w:The Magic Sword (1962 film)|The Magic Sword]]'' (1962), ''[[w:In the Cool of the Day|In the Cool of the Day]]'' (1963), ''[[w:One Man's Way|One Man's Way]]'' (1964), ''[[w:Major Dundee|Major Dundee]]'' (1965) with Charlton Heston, and ''[[w:That Darn Cat! (1965 film)|That Darn Cat!]]'' (1965) as FBI Agent Graham.<ref group="external" name="imdb_sullivan_films">{{cite web|url=https://www.imdb.com/name/nm0838217/#:~:text=He%20appeared%20in%20films%20such%20as%20That%20Darn%20Cat!%20(1965)%20as%20Graham%20and%20The%20Magic%20Sword%20(1962)|title=Liam Sullivan|publisher=IMDb|accessdate=23 January 2026}}</ref>
| death_month=  
 
| death_day=  
=== ''Battlestar Galactica'' ===
| death_year=  
 
| nationality=  
In 1978, Sullivan portrayed the primary [[Planner]]—a [[Theta|Theta-class lifeform]]—in the ''[[Battlestar Galactica (TOS)|Battlestar Galactica]]'' episode {{OS|The Gun on Ice Planet Zero, Part II|prose=y}}, which aired on 29 October 1978.<ref group="production" name="bsg_wiki_gun_ice_planet_cast">{{cite web|url=https://en.battlestarwiki.org/The_Gun_on_Ice_Planet_Zero,_Part_II#:~:text=Liam%20Sullivan%20as%20Planner%20(uncredited)|title=The Gun on Ice Planet Zero, Part II|publisher=Battlestar Wiki|accessdate=23 January 2026}}</ref> His role was uncredited in the original broadcast and was only identified decades later through computer-aided facial recognition technology employed by researchers documenting the series.<ref group="production" name="bsg_wiki_sullivan_uncredited">{{cite web|url=https://en.battlestarwiki.org/Liam_Sullivan#:~:text=a%20role%20for%20which%20he%20was%20uncredited%20but%20later%20identified%20through%20computer%2Daided%20facial%20recognition|title=Liam Sullivan|publisher=Battlestar Wiki|accessdate=23 January 2026}}</ref>
| imdb=  
 
| sortkey=Sullivan, Liam
Bits and pieces of Sullivan's unnamed character can be seen in the deleted scenes for this episode on both the DVD and Blu-Ray releases.<ref group="production" name="jetsmedia_sullivan_deleted_scenes">{{cite web|url=http://www.jetsmedia.ca/blog/gun-on-ice-planet-zero-50318c#:~:text=Bits%20and%20pieces%20of%20his%20(unnamed)%20character%20can%20be%20seen%20in%20the%20Deleted%20Scenes%20for%20this%20episode%20on%20both%20the%20DVD%20and%20Blu%2DRay%20releases|title=Gun on Ice Planet Zero|publisher=Jetsmedia|date=9 November 2020|accessdate=23 January 2026}}</ref>
}}
 
== Final years ==
 
During the latter stages of his life, Sullivan combined acting with writing. Just prior to his death, he was working on a novel and was also in the process of compiling a biographical history of the Eli Bridge Company.<ref group="external" name="imdb_sullivan_books_writing">{{cite web|url=https://www.imdb.com/name/nm0838217/bio/#:~:text=During%20the%20latter%20stages%20of%20his%20life%2C%20Liam%20combined%20acting%20with%20writing%20and%2C%20just%20prior%20to%20his%20death%2C%20was%20working%20on%20a%20novel.%20He%20was%20also%20in%20the%20process%20of%20compiling%20a%20biographical%20history%20of%20the%20Eli%20Bridge%20Company|title=Liam Sullivan - Biography|publisher=IMDb|accessdate=23 January 2026}}</ref> In the months prior to his death, Sullivan had signed publishing contracts for two books.<ref group="external" name="variety_sullivan_book_contracts">{{cite web|url=https://variety.com/1998/legit/news/liam-sullivan-74-1117470562/#:~:text=In%20the%20months%20prior%20to%20his%20death%2C%20Sullivan%20had%20signed%20publishing%20contracts%20on%20two%20books|title=Liam Sullivan, 74|publisher=Variety|date=7 May 1998|accessdate=23 January 2026}}</ref>
 
Sullivan's final screen appearance was as a Reporter in the TNT miniseries ''[[w:George Wallace (film)|George Wallace]]'' (1997), directed by [[w:John_Frankenheimer|John Frankenheimer]] and starring [[w:Gary_Sinise|Gary Sinise]] and [[w:Angelina_Jolie|Angelina Jolie]].<ref group="external" name="imdb_george_wallace_sullivan_reporter">{{cite web|url=https://m.imdb.com/title/tt0119189/fullcredits/#:~:text=Liam%20Sullivan,Reporter|title=George Wallace (TV Mini Series 1997) - Full cast & crew|publisher=IMDb|accessdate=23 January 2026}}</ref>
 
Sullivan died of a heart attack on 19 April 1998 in Los Angeles at age 74.<ref group="external" name="variety_sullivan_death">{{cite web|url=https://variety.com/1998/legit/news/liam-sullivan-74-1117470562/#:~:text=Liam%20Sullivan%2C%20a%20longtime%20stage%2C%20screen%20and%20television%20actor%2C%20died%20April%2019%20of%20a%20heart%20attack%20in%20Los%20Angeles.%20He%20was%2074|title=Liam Sullivan, 74|publisher=Variety|date=7 May 1998|accessdate=23 January 2026}}</ref> He was survived by a brother, a sister, three nieces and five nephews.<ref group="external" name="variety_sullivan_survivors">{{cite web|url=https://variety.com/1998/legit/news/liam-sullivan-74-1117470562/#:~:text=He%20is%20survived%20by%20a%20brother%2C%20a%20sister%2C%20three%20nieces%20and%20five%20nephews|title=Liam Sullivan, 74|publisher=Variety|date=7 May 1998|accessdate=23 January 2026}}</ref> Memorial services were held at 2 p.m. on 17 May 1998 at the Church of Religious Science, 260 Pass Avenue, Burbank.<ref group="external" name="variety_sullivan_memorial">{{cite web|url=https://variety.com/1998/legit/news/liam-sullivan-74-1117470562/#:~:text=Memorial%20services%20will%20be%20held%20at%202%20p.m.%20on%20May%2017%20at%20the%20Church%20of%20Religious%20Science%2C%20260%20Pass%20Ave.%2C%20Burbank|title=Liam Sullivan, 74|publisher=Variety|date=7 May 1998|accessdate=23 January 2026}}</ref>
 
Sullivan has a marker at Diamond Grove Cemetery in Jacksonville, Illinois, in the Sullivan family plot on the west side of Section L near the road, without an individual headstone.<ref group="external" name="findagrave_sullivan_burial">{{cite web|url=https://www.findagrave.com/memorial/17088617/liam-sullivan#:~:text=Buried%20in%20the%20Sullivan%20Family%20plot%20without%20an%20individual%20marker.%20Location%20is%20on%20the%20west%20side%20of%20Section%20L%20near%20the%20road|title=Liam Sullivan (1923-1998)|publisher=Find a Grave|accessdate=23 January 2026}}</ref> However, cemetery personnel have indicated this may be just a marker to honor Sullivan, as records cannot be located to confirm whether he is physically interred there following his death in California.<ref group="external" name="jacksonville_journal_cemetery_uncertainty">{{cite web|url=https://www.myjournalcourier.com/news/slideshow/10-things-you-may-not-know-about-Jacksonville-223148.php#:~:text=A%20marker%20for%20Liam%20Sullivan%20in%20Jacksonville%27s%20Diamond%20Grove%20Cemetery%2C%20but%20that%27s%20not%20where%20the%20story%20ends.%20It%27s%20not%20entirely%20known%20if%20Liam%20is%20physically%20buried%20here.%20Cemetery%20personnel%20said%20this%20is%20just%20a%20marker%20to%20honor%20Liam%20Sullivan.%20He%20died%20of%20a%20heart%20attack%20in%20Los%20Angeles%2C%20however%2C%20records%20cannot%20be%20located%20to%20confirm%20if%20California%20is%20his%20official%20resting%20place|title=10 things you may not know about Jacksonville actor Liam Sullivan|author=Dominic Genetti|publisher=Jacksonville Journal-Courier|date=22 June 2021|accessdate=23 January 2026}}</ref>
 
== References ==
 
=== External Sources ===
{{reflist|group=external}}


This is an overview of the actor or actress, include the date of birth as well as the role he or she played in the series. Remember to include which series as well.
=== Commentary and Interviews ===
{{reflist|group=commentary}}


For articles on cast and crew, refer to the [[Battlestar Wiki: Standards and Conventions (biographies)|Standards and Conventions for biographies]].
=== Production History ===
{{reflist|group=production}}


== External Links ==
== External Links ==


<!-- Please note that all templates are auto-applied by the Cast Data infobox. Unless the "nocat" attribute is inserted into the infobox, do NOT add any additional categories here. Thanks! -->
{{Ext-wikipedia|Liam Sullivan}}{{Ext-ma|article=Liam Sullivan}}
* {{findagrave|17088617|Liam Sullivan}}

Latest revision as of 21:55, 23 January 2026

Liam Sullivan
{{{credit}}}
Portrays: Planner (uncredited)
Date of Birth: May 18, 1923
Date of Death: April 19, 1998
Age at Death: 74
Nationality: USA USA
Related Media
@ BW Media


William E. Liam Sullivan (18 May 1923―19 April 1998) was an American actor and singer, professionally credited as Liam Sullivan. He portrayed the primary Planner, a Theta-class lifeform, in Original Series' "The Gun on Ice Planet Zero, Part II", a role for which he was uncredited but later identified through computer-aided facial recognition.

Sullivan's television career spanned 46 years across more than 115 productions.[external 1] His Romanesque features and precisely modulated voice made him ideally suited to portray smoothly roguish, arrogant or cynical characters, particularly in genre television.[external 2] Sullivan's most notable genre television appearances include The Twilight Zone, Star Trek: The Original Series, Logan's Run, Lost in Space, and Voyage to the Bottom of the Sea.

Early life and education

edit

Sullivan was born William Edward Sullivan on 18 May 1923 in Jacksonville, Illinois.[external 3] He was the son of Lee A. Sullivan Sr. (1889–1968) and Nell Sullivan (née Griffiths, 1891–1957).[external 4] His grandfather, W.E. Sullivan (1861–1932), founded the Eli Bridge Company, which built the innovative Big Eli Ferris Wheel in Jacksonville in May 1900.[external 5] The business remained in operation within the Sullivan family throughout his lifetime.[external 6]

Sullivan attended Jacksonville High School and Illinois College, where he had his first experience with acting in regional theater.[external 7] He later studied drama at Harvard University before pursuing a professional acting career.[external 8]

Career

edit

Stage work

edit

Sullivan made his way to New York and first appeared on Broadway in The Constant Nymph in 1951.[external 9] His Broadway career also included appearances in Merchant of Venice and the Mike Nichols production of The Little Foxes.[external 10] He later returned to the West Coast to perform in a Los Angeles stage production of Mary Stuart.[external 11]

Television

edit

By the early 1950s, Sullivan began appearing in television roles.[external 12] He became a familiar presence across all genres, from western to science fiction. Sullivan's only recurring television role was as Major Mapoy, the villainous cattle baron, in all 26 episodes of the ABC Western series The Monroes during the 1966–67 season.[external 13]

Sullivan's television credits included Star Trek, The Twilight Zone, Dragnet, Hawaii Five-O, Dallas, and L.A. Law.[external 14] Among his many television credits, two stand out as particularly memorable: his sadistic philosopher-king Parmen in the Star Trek episode "Plato's Stepchildren", and his obnoxious social-climbing upstart Jamie Tennyson in The Twilight Zone episode "The Silence", who unwisely accepts a bet for a half-million dollars that he can remain silent for a year.[external 15]

In "Plato's Stepchildren", which aired on 22 November 1968, Sullivan played Parmen, a tyrannical leader of a small community of people with telekinetic abilities who decides he wants McCoy to stay against his will on the planet as their doctor.[external 16] The episode is historically significant for featuring television's first scripted interracial kiss between Captain Kirk and Lieutenant Uhura.

Sullivan appeared in another Twilight Zone episode, "The Changing of the Guard", in which he played the Headmaster who must deliver news to an aging teacher played by Donald Pleasence.[external 17]

In the Dragnet episode "The Big Prophet" (1968), Sullivan as his character Brother William, a thinly disguised portrayal of Timothy Leary, held forth for the entire half-hour on the benefits of LSD and marijuana while Joe Friday argued the opposing view.[external 18]

Sullivan's other science fiction television appearances included playing Nexus in the Lost in Space episode "His Majesty Smith", scientist Anthony Sterling in the Voyage to the Bottom of the Sea episode "Leviathan", and an appearance in the Logan's Run television series.[external 19]

Sullivan often portrayed villains throughout his acting career. He once stated: "Playing truly evil people is a great way to release tension and anger and disgust with humanity. Show bad people what they really look and act like and maybe they'll recognize themselves and change. Who knows?"[commentary 1]

Film

edit

Sullivan's film work included The Magic Sword (1962), In the Cool of the Day (1963), One Man's Way (1964), Major Dundee (1965) with Charlton Heston, and That Darn Cat! (1965) as FBI Agent Graham.[external 20]

Battlestar Galactica

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In 1978, Sullivan portrayed the primary Planner—a Theta-class lifeform—in the Battlestar Galactica episode Original Series' "The Gun on Ice Planet Zero, Part II", which aired on 29 October 1978.[production 1] His role was uncredited in the original broadcast and was only identified decades later through computer-aided facial recognition technology employed by researchers documenting the series.[production 2]

Bits and pieces of Sullivan's unnamed character can be seen in the deleted scenes for this episode on both the DVD and Blu-Ray releases.[production 3]

Final years

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During the latter stages of his life, Sullivan combined acting with writing. Just prior to his death, he was working on a novel and was also in the process of compiling a biographical history of the Eli Bridge Company.[external 21] In the months prior to his death, Sullivan had signed publishing contracts for two books.[external 22]

Sullivan's final screen appearance was as a Reporter in the TNT miniseries George Wallace (1997), directed by John Frankenheimer and starring Gary Sinise and Angelina Jolie.[external 23]

Sullivan died of a heart attack on 19 April 1998 in Los Angeles at age 74.[external 24] He was survived by a brother, a sister, three nieces and five nephews.[external 25] Memorial services were held at 2 p.m. on 17 May 1998 at the Church of Religious Science, 260 Pass Avenue, Burbank.[external 26]

Sullivan has a marker at Diamond Grove Cemetery in Jacksonville, Illinois, in the Sullivan family plot on the west side of Section L near the road, without an individual headstone.[external 27] However, cemetery personnel have indicated this may be just a marker to honor Sullivan, as records cannot be located to confirm whether he is physically interred there following his death in California.[external 28]

References

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External Sources

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  1. Liam Sullivan (backup available on Archive.org) (in English). IMDb. Retrieved on 23 January 2026.
  2. Liam Sullivan - Biography (backup available on Archive.org) (in English). IMDb. Retrieved on 23 January 2026.
  3. Liam Sullivan - Biography (backup available on Archive.org) (in English). IMDb. Retrieved on 23 January 2026.
  4. Liam Sullivan (1923-1998) (backup available on Archive.org) (in English). Find a Grave. Retrieved on 23 January 2026.
  5. Liam Sullivan - Biography (backup available on Archive.org) (in English). IMDb. Retrieved on 23 January 2026.
  6. Dominic Genetti (22 June 2021). 10 things you may not know about Jacksonville actor Liam Sullivan (backup available on Archive.org) (in English). Jacksonville Journal-Courier. Retrieved on 23 January 2026.
  7. Liam Sullivan - Biography (backup available on Archive.org) (in English). IMDb. Retrieved on 23 January 2026.
  8. Liam Sullivan - Biography (backup available on Archive.org) (in English). IMDb. Retrieved on 23 January 2026.
  9. Liam Sullivan - Biography (backup available on Archive.org) (in English). IMDb. Retrieved on 23 January 2026.
  10. Liam Sullivan, 74 (backup available on Archive.org) (in English). Variety (7 May 1998). Retrieved on 23 January 2026.
  11. Liam Sullivan - Biography (backup available on Archive.org) (in English). IMDb. Retrieved on 23 January 2026.
  12. Liam Sullivan - Biography (backup available on Archive.org) (in English). IMDb. Retrieved on 23 January 2026.
  13. Liam Sullivan (backup available on Archive.org) (in English). IMDb. Retrieved on 23 January 2026.
  14. Liam Sullivan, 74 (backup available on Archive.org) (in English). Variety (7 May 1998). Retrieved on 23 January 2026.
  15. Liam Sullivan - Biography (backup available on Archive.org) (in English). IMDb. Retrieved on 23 January 2026.
  16. Star Trek: Plato's Stepchildren - Full cast & crew (backup available on Archive.org) (in English). IMDb. Retrieved on 23 January 2026.
  17. Liam Sullivan - Biography (backup available on Archive.org) (in English). IMDb. Retrieved on 23 January 2026.
  18. Liam Sullivan (backup available on Archive.org) (in English). IMDb. Retrieved on 23 January 2026.
  19. Liam Sullivan (backup available on Archive.org) (in English). IMDb. Retrieved on 23 January 2026.
  20. Liam Sullivan (backup available on Archive.org) (in English). IMDb. Retrieved on 23 January 2026.
  21. Liam Sullivan - Biography (backup available on Archive.org) (in English). IMDb. Retrieved on 23 January 2026.
  22. Liam Sullivan, 74 (backup available on Archive.org) (in English). Variety (7 May 1998). Retrieved on 23 January 2026.
  23. George Wallace (TV Mini Series 1997) - Full cast & crew (backup available on Archive.org) (in English). IMDb. Retrieved on 23 January 2026.
  24. Liam Sullivan, 74 (backup available on Archive.org) (in English). Variety (7 May 1998). Retrieved on 23 January 2026.
  25. Liam Sullivan, 74 (backup available on Archive.org) (in English). Variety (7 May 1998). Retrieved on 23 January 2026.
  26. Liam Sullivan, 74 (backup available on Archive.org) (in English). Variety (7 May 1998). Retrieved on 23 January 2026.
  27. Liam Sullivan (1923-1998) (backup available on Archive.org) (in English). Find a Grave. Retrieved on 23 January 2026.
  28. Dominic Genetti (22 June 2021). 10 things you may not know about Jacksonville actor Liam Sullivan (backup available on Archive.org) (in English). Jacksonville Journal-Courier. Retrieved on 23 January 2026.

Commentary and Interviews

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  1. Liam Sullivan - Biography (backup available on Archive.org) (in English). IMDb. Retrieved on 23 January 2026.

Production History

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  1. The Gun on Ice Planet Zero, Part II (backup available on Archive.org) (in English). Battlestar Wiki. Retrieved on 23 January 2026.
  2. Liam Sullivan (backup available on Archive.org) (in English). Battlestar Wiki. Retrieved on 23 January 2026.
  3. Gun on Ice Planet Zero (backup available on Archive.org) (in English). Jetsmedia (9 November 2020). Retrieved on 23 January 2026.
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