When the initial Cylon attack against the Twelve Colonies fails to achieve complete extermination of human life as planned, twin Number Ones (Cavils) embedded on Galactica and Caprica must improvise to destroy the human survivors.
Edward James Olmos
as Commander William Adama
Dean Stockwell
as Brother Cavil
Michael Trucco
as Samuel Anders
Grace Park
as Lt. Sharon 'Boomer' Valerii
Michael Hogan
as Colonel Saul Tigh
Callum Keith Rennie
as Leoben Conoy
Kate Vernon
as Ellen Tigh
Rick Worthy
as Simon
Lymari Nadal
as Giana O'Neill
Matthew Bennett
as Aaron Doral
Rekha Sharma
as Tory Foster
Tricia Helfer
as Number Six / Shelly Godfrey
