JACK AND HURLEY DISCOVER KATE'S SECRET, AND SOME SURVIVORS FEAR THAT THE ISLAND'S MYSTERIES THAT THEY'VE UNCOVERED WILL CAUSE A PANIC, ON ABC'S "LOST"

"Tabula Rasa" - Jack and Hurley discover an alarming secret about Kate, as the marshal's life hangs in the balance. Meanwhile Kate, Charlie, Sawyer, Sayid, Boone and Shannon ponder the island's mysteries they've uncovered and worry that telling the other survivors will cause panic, and Locke's befriending of Walt disturbs Michael, on "Lost," WEDNESDAY, OCTOBER 6 (8:00-9:00 p.m., ET), on the ABC Television Network.

"Lost" stars Naveen Andrews as Sayid, Matthew Fox as Jack, Jorge Garcia as Hurley, Maggie Grace as Shannon, Josh Holloway as Sawyer, Malcolm David Kelley as Walt, Daniel Dae Kim as Jin, Yunjin Kim as Sun, Evangeline Lilly as Kate, Dominic Monaghan as Charlie, Terry O'Quinn as Locke, Harold Perrineau as Michael and Ian Somerhalder as Boone.

Guest starring are Emilie de Ravin as Claire, Frederic Lane as the marshal and Nick Tate as Ray.

"Tabula Rasa" was written by Damon Lindelof and directed by Jack Bender.

"Lost" is broadcast in 720 Progressive (720P), ABC's selected HDTV format, with 5.1-channel surround sound.

A TV parental guideline will be assigned closer to airdate.