LOST - "Hearts and Minds" - When Locke learns that Boone wants to tell their "secret" to Shannon, Shannon's life is placed in sudden peril, and the shocking truth about her past with Boone is revealed. Meanwhile, Kate is puzzled by Sun's mysterious behavior, and a hungry Hurley must repay a debt to Jin, on "Lost," WEDNESDAY, JANUARY 12 (8:00-9:00 p.m., ET), on the ABC Television Network. EVANGELINE LILLY, MATTHEW FOX