LOST -- "?" - Mr. Eko enlists Locke to help find a secret location he believes houses answers to the island's mysteries. Meanwhile, Jack and the other survivors struggle to cope with the horrific situation in the hatch, on "Lost," WEDNESDAY, MAY 10 (9:00-10:01 p.m., ET), on the ABC Television Network. (ABC/MARIO PEREZ) TERRY OÕQUINN