Galactica discovers a planet with the ruins of a past civilization. Adama wants to survey the planet and settle down there permanently. But Roslin has a vision that convinces her that this is Kobol and that she has a part to play in an ancient prophecy. Lee and Kara have a fallout. Baltar catches Galactica's Boomer about to do something drastic. And Helo is unsure of what to do with Sharon.