| Edward James Olmos | Admiral William Adama |
| Mary McDonnell | President Laura Roslin |
| Katee Sackhoff | Captain Kara 'Starbuck' Thrace |
| Jamie Bamber | Lee Adama
(credit only) |
| James Callis | Dr. Gaius Baltar
(voice) |
| Tricia Helfer | Number Six /
Natalie Faust |
| Grace Park | Lt. Sharon 'Athena' Agathon |
| Tahmoh Penikett | Captain Karl 'Helo' Agathon |
| Michael Trucco | Ensign Samuel Anders |
| Alessandro Juliani | Lt. Felix Gaeta |
| Callum Keith Rennie | Leoben Conoy |
| Donnelly Rhodes | Dr. Cottle |
| Rekha Sharma | Tory Foster |
| Bodie Olmos | Lt. Brendan 'Hot Dog' Constanza |
| Alisen Down | Jean Barolay |
| Tiffany Lyndall-Knight | The Hybrid |
| Jen Halley | Ensign Diana 'Hardball' Seelix
(as Jennifer Halley) |
| Nana Visitor | Emily Kowalski |
| Alana Husband | Nurse Sashon |