Battlestar Galactica
Miniseries (2004)

A new form of the Cylons return from their forty-year absence in an attempt to exterminate the human race, beginning with a sudden, unexpected and simultaneous nuclear bombardment of the Twelve Colonies. The attack is made possible by the Cylons' infiltration of the Colonies' defense mainframe, through a Cylon agent known as Number Six who mimics a human woman both physically and behaviorally...