The Daily Mirror is reporting in an interview that Matthew Fox, Jack from LOST, is one of the people that knows how LOST is going to end. (My guess, Jack and Kate’s remains are those skeletons they found in the cave back in Season 1).
He’s keeping quiet about it though, even though cast members ask about it:
“Yes, it’s true. They understand I can’t talk about it, but sometimes they’ll ask, just hoping I’ll blurt it out.”
TV Buddy brings up a good question about this. Why did Carlton Cuse and Damon Lindelof tell Matthew Fox the ending?