This update of the late-1970s series takes a decidedly darker tone as what's left of humankind struggles for survival against the robot Cylons, who have killed millions. The Galactica, led by William Adama, protects a patched-together fleet of civilians -- led by de facto president Laura Roslin -- in search of a mythical planet called Earth.
Edward James Olmos as Cmdr./Adm. William Adama, Mary McDonnell as Laura Roslin, Katee Sackhoff as Capt. Kara "Starbuck" Thrace, Jamie Bamber as Capt. Lee "Apollo" Adama, James Callis as Dr. Gaius Baltar, Tricia Helfer as Number Six, Grace Park as Lt. Sharon "Boomer" Valerii/Lt. Sharon "Athena" Agathon, Michael Hogan as Colonel Saul Tigh, Aaron Douglas as Chief Galen Tyrol, Tahmoh Penikett as Lt. Karl "Helo" Agathon, Nicki Clyne as Crewman Specialist Cally Henderson, Allessandro Juliani as Lt. Felix Gaeta, Kandyse McClure as Officer Anastasia Dualla