LOST - "The Man Behind the Curtain" - Ben begrudgingly begins to introduce Locke to the secrets of the island, beginning with the mysterious Jacob. Meanwhile, Juliet's secret goes public, on "Lost," WEDNESDAY, MAY 9 (10:00-11:00 p.m., ET), on the ABC Television Network. (ABC/MARIO PEREZ) TERRY O'QUINN, MICHAEL EMERSON