A two-hour Battlestar Galactica special that tells the story of the Battlestar Pegasus several months prior to it finding the Galactica.

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.

The adventures of young William Adama in the First Cylon War.