I wonder if Peter will ever learn the truth that he is from World 2.
I thought it was kinda cool at the end when they were actually in the World Trade Center. I'm surprised there wasn't a big old brouhaha about the usage of this now sacred building.
But ya, the part with Peter and World 2... I didn't expect that. I assumed it was Peter's Mother who Walter was trying to get back. But I should have figured it out, especially earlier in the series, when Walter said Peter "miraculously" got better.
I knew something was up in that episode when Walter said Peter got better, but I thought he was just a clone or anything. I didn't really think of a parallel universe. Even in the previous episode, when Olivia was seeing the parallel universe, I just didn't put the two together. That said, it wasn't exactly a "shock" or anything.
I'm very pleased with Fringe. I was kind of on the fence about it after the first couple of episodes but they steadily improved the characters and storyline, and it's now one of my favorite current TV shows.
Between Fringe, Lost and Star Trek, JJ Abrams sure loves time travel and alternate universes.