List of Battlestar Galactica (2004 TV series) characters

Captain Aaron Kelly, played by , is the LSO (Landing Signal Officer) of the Galactica, serving directly under Colonel Saul Tigh.

Brendan Costanza ("Hot Dog"), played by Bodie Olmos, is a Viper pilot on Galactica.

James Lyman ("Jammer"), played by ,^[25] is a deckhand working under Galen Tyrol on Galactica in seasons one and two. In the 2006 web series The Resistance, Jammer is a member of the human Resistance against the Cylon occupation of New Caprica, but is shaken by the deaths of ten people at the hands of the Cylons in retaliation for Resistance activity. He is picked up and questioned by a Number Five Cylon model, who suggests Jammer become an informant to keep the Resistance from further damaging the fragile peace between humans and Cylons, and save human lives. Jammer balks at the idea. In season three, he has joined the New Caprica Police, ostensibly a buffer between the humans and Cylons, but functionally forced to do the Cylons' bidding. Jammer soon finds himself in over his head, as escalating strikes against the Cylons by the Resistance trigger escalating crackdowns on the populace by the Cylons. A masked Jammer helps Cally Henderson escape execution in "Precipice", and defends a fleeing President Roslin in "Exodus". In "Collaborators", Jammer is brought before a secret tribunal called The Circle, which sentences him to death for treason for his actions as part of the NCP. He begs Circle member Tyrol for mercy for saving Cally, but Tigh reasons that he has caused too many deaths and Jammer is executed via airlock. Cally is later unable to confirm for a guilt-ridden Tyrol that Jammer was the man who saved her. Writer Ronald D. Moore specifically focused "Precipice" on Jammer's role within the NCP as a means of personalizing someone working for the police force, in contrast to the focus on the Resistance in the previous episode, "Occupation".^[26]

Tucker Clellan ("Duck"), played by , is a Colonial Viper pilot aboard the Battlestar Galactica. Introduced in the season two "Flight of the Phoenix", he is also a central character in the web series The Resistance. After the killing of his wife, Nora, by Cylons, Duck joins the Resistance on New Caprica. He later dies as a suicide bomber in the season three episode "Occupation".

Jean Barolay, played by , is a player for the Caprica Buccaneers who, like her teammate Sam Anders, becomes part of a Resistance force against the Cylons when they devastate and occupy Caprica.

Charlie Connor, played by , is a member of the Resistance on New Caprica, later part of "The Circle", who secretly execute 13 collaborators, including Jammer. Robbins also plays the Armistice Officer, Boxey's father, in the 2003 miniseries.^[27]

Boxey, portrayed by , is a young boy who escapes the destruction of Caprice by the Cylons. He is the son of the Armistice Officer at Armistice Station, the first casualty of the attack. The character was intended to appear in multiple episodes of the series, but Widdows's additional scenes were cut.

Admiral Helena Cain, portrayed by ,^[4] is the first commanding officer of the Battlestar Pegasus, introduced in the season two episode "Pegasus". Following the destruction of the Colonies, Cain had become unhinged, and committed numerous war crimes. Though the Galactica had been believed to be the last surviving Battlestar, when the Pegasus reappears, Cain takes control of the fleet as Adama's superior officer. She is dissatisfied with how Adama has been managing it, which causes friction between her, Adama and Roslin. Cain is shot and killed in "Resurrection Ship" by Gina Inviere, a Cylon Number Six whom Cain had tortured for months. The character later appears, again played by Forbes, in the 2007 television film Battlestar Galactica: Razor.

Zak Adama, played by Clarke Hudson in the miniseries and by in the main series, is the younger son of William Adama, a Viper pilot killed in his first solo flight some time prior to the Cylon attacks. Lee's belief that Zak flew before he was ready due to pressure to please their father has damaged Lee and Adama's relationship.

Daniel Novacek ("Bulldog"), portrayed by , is a pilot who served under Commander William Adama aboard the Battlestar Valkyrie who lost while on a stealth mission across the Armistice Line approximately six years before the Fall of the Twelve Colonies. Bulldog reappears in the season three episode "Hero", having been a captive of the Cylons.

Emily Kowalski, portrayed by , is a terminal cancer patient befriended by Laura Roslin in the season four episode "Faith".

Number Seven (Daniel) is a male humanoid Cylon model mentioned, but never depicted, in the series. In the season four episode "No Exit", the last of the Final Five Cylons, Ellen Tigh, has been resurrected, and her memories as the creator of the numbered model Cylons have been restored. It is explained that the Daniels had been artistic and sensitive, and close with Ellen. A jealous Cavil sabotaged the genetics of the entire line of Sevens so that no more could be created, and then murdered the living copies.