Its just so much fun to speculate and discuss that I have to watch the episodes one at a time. Watching the first season straight through was great, but I wouldn't give up these discussions for anything.

xhonzi said:

Regarding the differences between the 815 flight in Lost2004 and Alt2004. It would be my guess that the differences surrounding Locke's knives and Christian's casket etc are part of fate manipulating events to get them back to the island one way or another.

But the Island is underwater. It throws a monkey wrench into all of my "we have to go back... again/for the first time!" theories.