LOST - "Maternity Leave" - A desperate Claire, along with Kate and Rousseau, attempts a return to the scene of her kidnapping where she believes she might find the cure for Baby Aaron's mysterious illness. Meanwhile, Jack and Locke must keep their prisoner a secret from the rest of the survivors, on "Lost," WEDNESDAY, MARCH 1 (9:00-10:00 p.m., ET), on the ABC Television Network. (ABC/MARIO PEREZ) WILLIAM MAPOTHER, EMILIE DE RAVIN