I only started watching Fringe five weeks ago. I inhaled all the episodes in about two weeks' time. So when I say I've known for weeks, I mean since some time in season one as well. *grins*

My theory is that Peter really did die in that car accident, so Walter went to the alternate universe and stole that Peter away from his alternate self.

I think it will get a third season. They are promoting the heck out of it. Of course, it's Fox so you never know because they've done a hatchet job on most of their sci-fi stuff recently. Still they are so hoping for something like X-Files again that they may hold tight to this one. I certainly hope so.

It's just so good.