He could not have been dreaming as he knew that Charlie was going to die and how...thus his efforts to constantly come between Charlie and his fate. Not linear, sounds plausible...but he actually relived various parts...thus changing smaller things.

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JC
URCNA
PA, but homesick for SC

"Who says you can't go back, been all around the world and as a matter of fact. There's only one place left I want to go, who says you can't go home" Bon Jovi