When Locke learns that Boone wants to tell their "secret" to Shannon, Locke decides to teach him a lesson, which leads to Shannon's life being "supposedly" placed in sudden peril. Also, Boone and Shannon's dark dark past is revealed in a shocking backstory that recalls his life with Shannon right before the plane crash and presages the return of the beast.

Meanwhile, Kate who has become a confidante to Sun in the forest is puzzled by a soft-spoken Sun's mysterious behavior and revelation that she can speak English, and a hungry Hurley must repay a debt to Jin.

original airdate--January 12,2005         rating--20.81 million

song--"Main Title" (Composed by J.J. Abrams)