My biggest fear with Lost is that the ending is going to be something like the ending in St. Elsewhere (some of you are probably too young to remember that show) but in the end the hospital was all in the imagination of an autistic boy.
I worry that the common thread and link is Hurley who was in a mental hospital and that the entire Island and characters are made up in his mind. They hinted at that in one of the seasons. This would explain why one of the characters on the Island , the psychologist, was in the same mental hospital. It would also explain why he can talk to the characters who have died and why he is one of the few people who can see Jacob.
I hope to God that's not how they end it because I think it is just a lame and lazy way to end the series.
"I want answers! [language filter]!"