Part 1
S1, E1: After forty years of uneasy peace, the Cylons launch a sudden attack on the Twelve Colonies, overwhelming defenses and wiping out major population centers in a devastating nuclear strike (Part 1 of 2).

S1, E1: After forty years of uneasy peace, the Cylons launch a sudden attack on the Twelve Colonies, overwhelming defenses and wiping out major population centers in a devastating nuclear strike (Part 1 of 2).