LOST -- "S.O.S." - Rose is surprisingly and vehemently opposed to Bernard's plan to create an S.O.S. signal; romantic sparks are rekindled between Jack and Kate when they trek into the jungle to propose a "trade" with "The Others"; and Locke begins to question his faith in the island, on "Lost," WEDNESDAY, APRIL 12 (9:00-10:01 p.m., ET), on the ABC Television Network. (ABC/MARIO PEREZ) SAM ANDERSON, L. SCOTT CALDWELL