Hard Eight

Shortly after the Cylon Attack ends, an Eight in a pale blue tunic is one of four 'rebirth nurses' who greet Caprica-Six following her rebirth (this takes place at the same time as the events of the middle or end of the Miniseries, but is seen in the much later episode "Downloaded").
An Eight wearing a gray coat is witnessed by Helo at the spaceport at Delphi. She notices him and draws a gun on him, but is quickly shot by the Sharon with him. This reveals to Helo that his Sharon is a Cylon ^{(TRS: "Colonial Day")}.
Multiple nude copies of the Eight model are present on the basestar over Kobol and confront Sharon Valerii outside the Raptor she has landed within the vessel, telling her that they love her and will see her again ^{(TRS: "Kobol's Last Gleaming, Part II")}. They are blown up along with the rest of the Basestar when the warhead planted by Valerii detonates. Despite having time to act, they do nothing to stop the warhead and apparently activate Valerii's Cylon programing once more as she later shoots Commander Adama without the usual trigger for her programing being present.
An Eight is among a group of rebirth nurses, possibly the same one that midwifed Caprica-Six, who welcome the reborn Sharon Valerii. Valerii becomes hysterical after seeing and hearing this copy.
A copy of Number Eight is seen at the end of "Final Cut," also wearing a grey coat like other Eights on Caprica, remarking in delight that the Sharon who escaped Caprica with Helo and Starbuck is still alive (and saying, "I told you" to the Number Five copy sitting next to her).

Numerous copies of Eight are seen on Cylon occupied Caprica throughout the episode "Downloaded".
Several Eights are part of a group of humanoid Cylons blown up on New Caprica by a bomb planted by Samuel Anders and Galen Tyrol as they approach a group of Centurions exiting from a Heavy Raider which has just landed.
Another Eight sits next to Valerii on Colonial One during the Cylon Occupation Authority's discussion of the suicide bombing of New Caprica City's power station and the subsequent proposal that harsher measures be adopted. She does not speak during the meeting.
An Eight, referred to in script as "Sweet Eight," seduces Felix Gaeta on New Caprica. She offers to check on and, when possible, rescue prisoners whom he cares about. Secretly aware that Gaeta is working with the human resistance, "Sweet Eight" saves a few token humans from Gaeta's lists and orders the remainder killed as being valuable to her human enemies. Much later, "Sweet Eight" kills everyone else aboard Raptor 718 except Gaeta, including another Eight, in order to save oxygen for herself and Gaeta. Gaeta discovers this and she reveals her actions during the occupation of New Caprica. Gaeta then kills her ^{(TRS: "The Face of the Enemy")}. Gaius Baltar was aware of her actions on New Caprica ("Taking a Break From All Your Worries"; confirmed in "The Face of the Enemy").
An Eight can be seen practicing a Cylon version of Tai Chi in the episode "Torn" while nude.
Another Eight is among the infected Cylons captured by Galactica as part of the Colonials' plot to infect the Cylon race with the virus from the Lion's Head beacon. She and the others are executed by Karl Agathon before the plan can be put into action ^{(TRS: "A Measure of Salvation")}. Because no Resurrection Ship was in range, her death is final.
The Number Eights in the episode "Six of One," with the exception of Sharon Valerii, are supporters of the Number Six Natalie. They are excited at the prospect of discovering the Final Five and vote with the Twos and Sixes against the lobotomization of the Cylon Raiders.
The Eights in Natalie's group decide that they need to mutiny and turn to Athena to lead the rebellion. She refuses and tells them they need to pick a side and stick with it. One is mortally wounded by a Centurion (which is then killed by Starbuck) while attempting to disconnect the Hybrid. She apologizes to Athena asking for forgiveness admitting that Athena was right. Athena doesn't grant it, but Samuel Anders holds her hand and comforts her as she dies ^{(TRS: "Faith")}.
Another copy works with Karl Agathon during the attack on the Cylon Resurrection Hub. When she gives him a massage like his wife does, he asks her about it and she say that she was curious about Sharon Agathon, so she downloaded her memories from the last time Agathon resurrected ^{(TRS: "Rapture")}. This makes her Sharon Agathon to some extent, complete with an emotional attachment to Karl Agathon. She is aware that it is an awkward situation for Karl, but is still annoyed when he rebuffs her. Shortly after, she helps him by giving a speech to the reluctant Viper pilots that motivate them to trust the Cylons. During the battle she and Karl take a Raptor to the Hub to retrieve the unboxed Number Three. Afterwards, she is furious when she learns that the humans double-crossed them and have no intention of handing over the Three ^{(TRS: "The Hub")}. In a deleted scene for the episode she is shot seconds after this revelation by a Cavil that was part of a boarding party. Helo kills the Cavil and goes to help her, but she's dead.
A pilot Eight, referred to as "Hard Eight" in script, is aboard Raptor 718 when it becomes separated from the Fleet. While attempting to repair a loose connection using deckhand Brooks' pliers, she is fatally electrocuted, after which it is discovered that the insulation had been stripped from the pliers. "Sweet Eight" is later revealed to have stripped the insulation, intending to kill the deckhand in order to save oxygen ^{(TRS: "The Face of the Enemy")}.
Several copies work around Galactica applying the organic resin.
Another copy is either knocked out or killed by Tyrol and used to replace Boomer so she could escape.
Another copy has to forcibly restrain a Six who nearly gets into a fight with a human worker.
Another Eight (or possibly the same one that restrained the Six) is mortally wounded during the hull breach on Galactica. She asks to see Colonel Tigh, who she knows by this point is her "father," as the Final Five are the creators of the eight numbered models. Tigh visits this Eight on her deathbed and thus she is able to die with some peace.
The remaining Eights who survived the Battle of The Colony presumably joined the human race with the rest of the Cylons.