Battlestar Galactica S01 E08 Flesh and Bone

"So say we all!"

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.