Edward James Olmos Adm. William Adama Actor Mary McDonnell President Laura Roslin Actor Katee Sackhoff Capt. Kara "Starbuck" Thrace Actor Jamie Bamber Cmdr. Lee "Apollo" Adama Actor James Callis Dr. Gaius Baltar Actor Tricia Helfer Number Six, Caprica Actor Grace Park Lt. Sharon "Boomer" Valerii Actor Michael Hogan Col. Saul Tigh Actor Aaron Douglas Chief Galen Tyrol Actor Tahmoh Penikett Lt. Karl "Helo" Agathon Actor Lucy Lawless D'Anna Biers Actor Michael Trucco Samuel Anders Guest Star Donnelly Rhodes Dr. Cottle Actor Matthew Bennett Aaron Doral Guest Star Rekha Sharma Tory Foster Guest Star Kerry Norton Medic Layne Ishay Guest Star Alisen Down Jean Barolay Guest Star Erica Cerra Maya Guest Star Diego Diablo del Mar Hillard Guest Star Jeff Woolnough Director Bradley Thompson Writer David Weddle Writer