101084_9592 -- LOST - ÒWhite RabbitÓ Ð Jack is near delirious from lack of sleep and struggles to overcome the haunting events that brought him to Australia and, subsequently, to the island. Meanwhile, Boone gets caught in a treacherous riptide, the pregnant ClaireÕs health takes a bad turn, and a thief may have stolen the last bottles of water. Veronica Hamel (ÒHill Street BluesÓ) guest stars as JackÕs mother, on ÒLost,Ó WEDNESDAY, OCTOBER 20 (8:00-9:00 p.m., ET), on the ABC Television Network. (ABC/MARIO PEREZ) EVANGELINE LILLY, IAN SOMERHALDER