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 who 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.

• The Armistice Station Officer is the first member of the Colonial Fleet to see the Cylons in over 40 years. He is killed when the cylons destroy the station. Played by Ryan Robbins, (who also played Charlie Connor in the regular series). He only appears in the first part of the miniseries.
• 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. He appears in one episode.
• Emily Kowalski is a terminal cancer patient befriended by Laura Roslin. She appears in one episode played by Nana Visitor.
• 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. Played by Campbell Lane. He only appears in the two-hour television movie Razor.
• Hera Agathon is the first successful Human/Cylon hybrid. 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.
• Sue-Shaun is a member of Samuel Anders' resistance group on Caprica, and a former Caprica Buccaneer. Played by Tamara Lashley. She appears in three episodes. She is mercy-killed by Starbuck at her own request.
• 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. She appears in 32 episodes played by Rekha Sharma.
• Tucker Clellan was a Colonial Viper pilot about the Battlestar Galactica. He was a central character in the 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 and dies as a suicide bomber. Tucker was portrayed by Christian Tessier.
• Zak Adama is the younger son of William Adama, a Viper pilot killed in his first solo flight. He was portrayed by Clarke Hudson in the miniseries and Tobias Mehler in the full series.
• Louanne Katraine ("Kat") was 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.
• Samuel T. Anders is a humanoid Cylon who forms a resistance group on Caprica and later serves as a pilot in the colonial fleet.

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". They were not individually numbered and were not discovered until later in the series. The Cylon-humanoids first seen are known as the "Significant Seven" and were numbered one to eight. Number Seven does not make an appearance as his entire line had been destroyed prior to the start of the series.

The "Significant Seven"

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

The "Final Five"

1. Samuel Anders
2. Tory Foster
3. Ellen Tigh
4. Saul Tigh
5. Galen Tyrol