Edward James Olmos Cmdr. William Adama Actor Mary McDonnell President Laura Roslin Actor Katee Sackhoff Lt. Kara "Starbuck" Thrace Actor Jamie Bamber Capt. Lee "Apollo" Adama Actor James Callis Dr. Gaius Baltar Actor Tricia Helfer Number Six 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 Paul Campbell Billy Keikeya Guest Star Nicki Clyne Crewman Specialist Cally Henderson Guest Star Alessandro Juliani Lt. Felix Gaeta Guest Star Kandyse McClure Officer Anastasia Dualla Actor Kate Vernon Ellen Tigh Guest Star Donnelly Rhodes Dr. Cottle Actor Richard Hatch Tom Zarek Guest Star Luciana Carro Louanne "Kat" KatraineBodie Olmos:Brendan "Hot Dog" ConstanzaLeah Cairns:Racetrack Guest Star Bodie Olmos Brendan "Hot Dog" Constanza Guest Star Leah Cairns Racetrack Guest Star Michael Rymer Director, Writer Sergio Mimica-Gezzan Director Michael Nankin Director Rod Hardy Director Jeff Woolnough Director Allan Kroeker Director Robert M. Young Director Reynaldo Villalobos Director Bradley Thompson Writer Anne Cofell Saunders Writer Mark Verheiden Writer Ronald D. Moore Writer David Eick Writer Jeff Vlaming Writer Joel Anderson Thompson Writer Carla Robinson Writer Toni Graphia Writer David Weddle Writer Nicole Yorkin Writer