We are going to tell you why the plane crashed, Lost executive producer Carlton Cuse tells Newsweek of the season finale. "We're going to explain what happens if you don't push the button. And we're going to resolve the Michael-and-Walt story." Just as last year's finale expanded our scope of the island's boundaries, this year's will expand its relevance, writes Senior Writer Marc Peyser in an exclusive interview with the cast of the ABC hit drama, Lost on the set in Hawaii. One more thing: we think another character is going to die, or come close, Peyser writes in the May 22 issue of Newsweek (on newsstands Monday, May 15). It's just a hypothesis, based on the fact that when Newsweek asked Michelle Rodriguez to guess which character would die after Libby, she said, "I can't do that, 'cause I know." Then she clammed up.

You could tell that the cast is exhausted -- and that they're starting to get on each other's nerves, Peyser writes. "It's tough being involved in a shoot with a large cast," says Dominic Monaghan, sitting in his trailer, where the floor is piled with FedEx envelopes filled with fan mail. "Just the sheer politics can drag you down. So-and-so is not getting screen time. So-and-so is not showing up on time. So-and-so isn't behaving well on set. That's the toughest thing-coming home and going, Well, I behaved OK, but three or four people didn't." "We're like brothers and sisters," says Evangeline Lilly. "There are days when you want to thank them for being in your life, and there are days when you want to punch them in the face."

You'd better behave on Lost -- no network TV show has ever killed off so many major characters so early in its run. The actors know they're vulnerable- in an early version of the pilot, the producers had planned to kill Jack and changed their minds only when Stephen McPherson, now the president of ABC Entertainment, talked them out of it. Do the actors worry about their fates? "Sure, I'll be out of a good job," says Terry O'Quinn. "I don't think there's any person on this show who is not expendable. If I said they didn't have the nerve to kill me, I'd be some kind of fool, wouldn't I?"

Fans are warned not to try to connect every plotlet. "We never promised that there would be a unified-field theory of Lost," says Damon Lindelof, who created the show with J. J. Abrams (Alias, M:i:III). "You'll get many small answers along the way, and ultimately you will understand this island, but all those answers might not necessarily be reduced to a simple one- sentence explanation." Until then, all you conspiracy theorists-just enjoy the trip, and get lost.