LOST - "Catch-22" - Desmond coaxes Charlie, Hurley and Jin on a trek across the jungle after experiencing one of his future-prophesizing "flashes" -- but is he purposely placing Charlie's life in harm's way? Meanwhile, Kate turns to an unwitting Sawyer after seeing Jack alone with Juliet, on "Lost," WEDNESDAY, APRIL 18 (10:00-11:00 p.m., ET), on the ABC Television Network. (ABC/MARIO PEREZ) JOSH HOLLOWAY