102428_2453 -- LOST - "Do No Harm" - While Jack scrambles to save the life of a survivor, Claire goes into labor. Meanwhile, Locke is missing, and Sayid presents Shannon with a romantic surprise, on "Lost," WEDNESDAY, APRIL 6 (8:00-9:01 p.m., ET), on the ABC Television Network. (ABC/MARIO PEREZ) JULIE BOWEN, MATTHEW FOX