It's Déjà vu All Over Again!
Ben tries to convince the survivors that the people on the freighter are not the good guys. How does he know? Well, he has a spy on the boat. Speaking of the boat, Lapidus flies Sayid and Desmond out to the freighter. Desmond has some sort of déjà vu/amnesia thing happening. He keeps bouncing back and forth between 2004 and 1994. While back in the 1990s, Des tracks down a young Daniel Faraday, who makes him realize that he's caught in a time warp. He needs a constant to make it stop. He has one: Penny.