List of Battlestar Galactica characters

Episode counts include the two part mini-series as well as the two television movies Razor and The Plan.

• Helena Cain is the first commanding officer of the Pegasus. Following the destruction of the Colonies, Cain became unhinged, and committed numerous war crimes. She is shot dead by Gina Inviere, a Cylon Number Six whom she had tortured for months on end. Played by Michelle Forbes.
• Alastair Thorne is an officer aboard the Battlestar Pegasus known as the "Cylon Interregator", played by Fulvio Cecere. He appears in two episodes.
• Barry Garner is the third commanding officer of Pegasus. Before his promotion, he was the ship's chief engineer, played by John Heard. He appears in one episode and suffocates while fixing the Pegasus FTL drive.
• Cole "Stinger" Taylor is the CAG of the Battlestar Pegasus serving under Admiral Helena Cain. Played by John Pyper-Ferguson. He appears in two episodes.
• Gage is a Specialist serving on the Battlestar Pegasus, and later on Galactica, played by Mike Dopud. He appears in four episodes and serves in Gaeta's mutiny.
• Jurgen Belzen was the XO of the Pegasus. Portrayed as a long-time confidant of Adm. Helena Cain, he is nevertheless summarily executed by her for insubordination. Played by Steve Bacic.
• Jack Fisk was the Pegasus' second-officer at the time of the attacks. A Lieutenant-Colonel, he is promoted to Colonel upon assuming Belzen's duties as XO, and later serves as interim CO of the Pegasus after the murder of Helena Cain before being murdered himself. Portrayed by Graham Beckel.
• Kendra Shaw is the executive officer on Pegasus under Lee Adama, played by Stephanie Jacobsen. She is the protagonist of the two-hour television movie Razor.
• Mel "Freaker" Firelli is an officer on Pegasus. Played by P.J. Prinsloo. He appears in two episodes.
• Noel Allison ("Narcho") is a senior Viper pilot on the Battlestar Pegasus who later transfers to Galactica, played by Sebastian Spence. He appears in nine episodes.
• Peter Laird is a civilian aeronautical engineer pressed into service on the Battlestar Pegasus by order of Admiral Helena Cain after the Cylon attack on the Twelve Colonies, played by Vincent Gale. He appears in six episodes and is killed by Tom Zarek during Gaeta's mutiny.
• Vireem is a Specialist serving on the Battlestar Pegasus and later on Galactica, played by Derek Delost. He appears in three episodes and serves in Gaeta's mutiny.

• Zak Adama is the younger son of William Adama, a Viper pilot killed in his first solo flight. Zak was portrayed by Clarke Hudson in the miniseries, while Tobias Mehler played Zak in four episodes of the main series.
• Hera Agathon is the first successful Human/Cylon natural born child. She is the daughter of Karl "Helo" Agathon and Sharon (Number 8) "Athena". Played in different episodes by child actors Lily Duong-Walton, Alexandra Thomas and Iliana Gomez-Martinez.
• Samuel Anders is a well-known athlete with the Caprica Buccaneers who forms a resistance group on Caprica with his teammates and later serves as a pilot in the colonial fleet. In the season 3 finale, he learns that he is a Final Five Cylon rather than a human. He later becomes Galactica's Hybrid. Played by Michael Trucco, Anders appears in 36 episodes.
• Tucker Clellan ("Duck") is a Colonial Viper pilot aboard the Battlestar Galactica. He was a central character in the 2006 web series "Battlestar Galactica: The Resistance", as well as appearing in the main series. Becoming depressed after the death of his love, Nora, he joins the resistance on New Caprica and dies as a suicide bomber. Played by Christian Tessier, Duck appears in six webisodes and five episodes of the main series.
• Charlie Connor, a member of the resistance on New Caprica, later part of "The Circle" who secretly execute 13 collaborators from New Caprica. Played by Ryan Robbins, Connor appears in seven episodes.
• "Crashdown" is a Raptor electronic countermeasures officer from the destroyed Battlestar Triton who joins the Galactica crew. A member of a three-Raptor survey party sent to examine the planet Kobol, Crashdown takes command of a small group when his Raptor is shot down; his inept and life-threatening leadership of the group ends when Dr. Baltar shoots him before Crashdown can shoot Cally. Played by Sam Witwer, Crashdown appears in 11 episodes.
• Tory Foster is one of President Laura Roslin's chief aides and advisors. She is also one of the few who knows the whereabouts of the half-Cylon child, Hera Agathon. In the season 3 finale, she learns that she is a Final Five Cylon, rather than a human. Played by Rekha Sharma, Foster appears in 32 episodes.
• Louanne Katraine ("Kat") is a Colonial Viper pilot serving aboard Galactica. She was a former smuggler who took the identity of a dead girl, hoping to redeem herself following the attack. She and Starbuck become rivals, and the two frequently butt heads, developing a love-hate relationship. Following several near-death experiences, Kat becomes addicted to drugs she had been taking to deal with the stress, though she quits after nearly crashing her Viper while under the influence. She dies from severe radiation poisoning sustained while guiding several civilian ships out of a highly radioactive area. Played by Luciana Carro, Kat appeared in 18 episodes.
• Billy Keikeya is Roslin's Chief of Staff at the start of the second Cylon War. He was one of the few people she considered family. He died in a shoot-out that precipitated from a hostage situation on the luxury liner 'Cloud Nine.' Played by Paul Campbell, Billy appeared in 25 episodes.
• Emily Kowalski is a terminal cancer patient befriended by Laura Roslin. Played by Nana Visitor, Kowalski appears in one episode.
• Romo Lampkin is a defense attorney, traveling on one of the civilian ships. He is called on, at different times, to defend Lee Adama and Gaius Baltar. Becomes President of the Twelve Colonies Of Kobol in the final episode, before the final survivors choose to scatter across the second Earth. Portrayed by Mark Sheppard, Lampkin appears in seven episodes.
• Maya is chosen as the adoptive human mother of Hera Agathon, though she is not told who the baby is. Played by Erica Cerra, Maya appears in four episodes.
• Daniel Novacek ("Bulldog") is a pilot who served under Commander William Adama aboard the Battlestar Valkyrie and was lost while on a stealth mission across the Armistice Line approximately six years before the Fall of the Twelve Colonies. Played by Carl Lumbly, Bulldog appears in one episode.
• Sue-Shaun is a member of Samuel Anders's resistance group on Caprica and a former Caprica Buccaneer. She is mercy-killed by Starbuck at her own request. Played by Tamara Lashley, Sue-Shaun appears in three episodes.
• The First Hybrid is the precursor to the modern Cylon Hybrids, and is the first step in their evolution from pure machines to organic beings. Only appears in the two-hour television movie Razor, played by Campbell Lane.

Early in the series, the Colonials learn there are twelve models of Cylon-humanoids among them. The first of them were descendants of the lost thirteenth tribe called the "Final Five", who were not individually numbered and were not discovered until later in the series. The seven Cylon-humanoids first seen in the series are known as the "Significant Seven" and were numbered one to six, then jump to eight. The Number Seven model does not make an appearance, as his entire line had been destroyed prior to the start of the series.

The "Significant Seven", with their model number

1. John Cavil
2. Leoben Conoy
3. D'Anna Biers
4. Simon O'Neill
5. Aaron Doral
6. "Caprica Six" (multiple identities)
7. (Daniel - unseen, not one of the "Significant Seven")
8. Lt. Boomer / Lt. Athena

The "Final Five"

• Samuel Anders
• Tory Foster
• Ellen Tigh
• Saul Tigh
• Galen Tyrol