A Cylon, who calls himself Leoben, is discovered on one of the ships in the fleet. Commander Adama sends Kara to interrogate him or, rather, it. The Cylon tells Kara that he planted a nuclear device on one of the ships. Although she doesn't believe it, Kara passes on the warning.
As her colleagues search for the device, Kara engages Leoben in a battle of wills. Theological debates about souls and the humanity of Cylons lead to mind games, threats, and, ultimately, torture. Taking a personal interest in what Leoben has to say, President Roslin joins the interrogation.
On Galactica, Sharon asks Baltar to try out his new Cylon-detecting technology on her.
Meanwhile, on far-off Caprica, another Sharon conspires with her Cylon associates Doral and Number Six to convince Helo to remain on the planet and start a new life.
The pirate Heracleo betrays team Spartacus, Caesar stabs Spartacus, Agron does an amazing spin down a rope, and Crixus and Naevia return to fight for the city. A real action packed sequence.
Caesar: spreading news and making everyone hate each other. When Crixus gets wind of his tale, he confronts Agron head-on.
Count all of this episode's zombie kills along with us.