When the Base Star arrives back at the fleet D’Anna holds the humans hostage in exchange for the four.  She travels with Adama back to the Galactica in order to make her demands and Tigh, Anders, Tyrol and Tory are all there in the hanger.  Tory uses Roslin's medicine as an excuse to join the other Cylons on the Base Star and reveals herself to Roslin and Baltar as a Cylon once there.  Meanwhile, D'Anna kills one of the hostages in an escalation of the impasse and Colonel Tigh reveals to Adama that he is a Cylon and offers himself to use in the negotiations.  Tyrol and Anders ask Starbuck about her Viper stating that something is wrong with it but they get taken into custody when Tigh turns them in.  Starbuck learns about a signal apparently coming from Earth and rushes to stop Lee from blasting Tigh into space.  President Adama meets with D'Anna in order to work out a truce and a way to cooperate in finding Earth.  The fleet with the Cylons jump to Earth but it isn't exactly as they has hoped it would be.