The crew's loyalties are put to the test when a Cylon suicide bomber infiltrates the Galactica and kills five people. Who let the bomber through security?
A Cylon virus has penetrated Galactica's computers, and Cylon Centurions have boarded the ship. Plus, Number Six has a deathly prophecy for Baltar.
New Caprica has become a bleak and paranoid place, but its oppressed citizens cling to two frail hopes: that their resistance movement will weaken the Cylons, and that Admiral Adama and his fleet will return to rescue them.
Colonel Tigh's struggling after imposing martial law, and a desperate Lee tries to free President Roslin and restore order.
Galactica's crew co-ordinate their attacks with New Caprica's insurgents, forcing the Cylons to take drastic steps to reach a final solution to the crisis.
