Baltar has carried on a 2-year affair with a beautiful woman whom he believed to be a corporate spy, giving her access to the defense systems he has designed for the planet Caprica. When the Cylons attack and annihilate the Twelve Colonies, Baltar realizes that Number Six is, in fact, a humanoid Cylon herself. Set on avoiding discovery as a traitor, he finds himself appointed to head up the Battlestar Galactica’s research facilities. But an implanted computer chip means that Baltar is unable to leave Six behind ...