| cast |
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| Series Regulars | |||
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| Aaron Douglas | Aaron Douglas as Tyrol | Edward James Olmos | Edward James Olmos as Commander Adama |
| Grace Park | Grace Park as Lt. Sharon "Athena" Agathon / Lt. Sharon "Boomer" Valerii | James Callis | James Callis as Gaius Baltar |
| Jamie Bamber | Jamie Bamber as Lee Apollo Adama | Kandyse McClure | Kandyse McClure as Officer Anastasia Dualla |
| Katee Sackhoff | Katee Sackhoff as Kara Starbuck Thrace | Mary McDonnell | Mary McDonnell as President Laura Roslin |
| Michael Hogan | Michael Hogan as Colonel Tigh | Michael Trucco | Michael Trucco as Samuel Anders |
| Paul Campbell | Paul Campbell as Billy Keikeya | Tricia Helfer | Tricia Helfer as Number Six |
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| Recurring & Guests | |||
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| Callum Keith Rennie | Callum Keith Rennie as Leoben Conoy | Erica Cerra | Erica Cerra as Maya |
| Lucy Lawless | Lucy Lawless as D'Anna Biers | Michelle Forbes | Michelle Forbes as Admiral Helena Cain |
| Sam Witwer | Sam Witwer as Alex Crashdown Quartararo | Ty Olsson | Ty Olsson as Captain Aaron Kelly |