I haven't read every reply. Just a note about Olivia moving from a restaurant on the 25th floor to the twin towers. Maybe places/buildings/whatever in this alternate are a few kilometers from where they are in the reality she came from?

This was a great finale. Being the huge fan of 'Sliders' that I was, I'm thrilled with all the alternate worlds possibilities.

The grave is in the other universe. Astrid said that Walter use to get lost several times...and he used LSD to travel between the dimensions. So, he took death Peter into the other world and bring back here the second son. I think that both, Bell and Bishop are able to cross when they want.

The Massive Dynamics building is one of the new World Trade Center buildings... 7 WTC I believe. So I thought it was an awesome touch that Olivia met William Bell in the old World Trade Center.

I love the NYC touches, why is the show moving to Vancouver next year?

Think I got the answer to when the universe shift took place.

I agree with a prior commenter who said the shift from one universe to another didn't happen in the elevator, but on the car ride. When Olivia was driving through the streets of New York, another car nearly slammed into her and she had to swerve. And I wondered why they put that in there. And then I realized. It's because that's where she passed from one universe to the other, suddenly appearing in front of that driver.

Since the WTC no longer exists in our universe, they could not get her to the top of the alternate WTC with a direct spot to spot universe transfer, so the alt universe transfer had to happen on the street. Once she was in the elevator, then she was transported from one spot in the alternate universe to the top of the alt WTC.

Sorry if someone already said this. I haven't read all the comments.

Perhaps Walter had to travel to the alt universe to save Peter's life there so he could bring him back to his world. It's really nice to see a few good male role models instead of the usual idiot dads on tv. Walter's made a lot of mistakes, but he's trying to make up for them and it's obvious he and Peter love each other. Loved the finale and can't wait for next season.

Nice Epi.. just caught on DVR.. On Pete's grave it said he died at 7 years old (I could be wrong).. that would mean Walter went into the alternate reality and took Peter when he was relatively old.

I wonder if certain memories Pete has of his father are really from the alternate reality Walter. Pete did say he remembered Walter being alot bigger back then.. that could be because he was a child OR that wasn't the Walter we know but alternate reality Walter who is a bodybuilder! he. he.

it seems whenever we are about to get some answers the damn guy dies..

I was happy when someone else fired a gun it seemed this season Olivia was the only one who had clearance to do so.
Agreed the whole WTC in an alternate reality was played. It would have been better if Olivia flashed into a decapitated Lady Liberty Head on the beach. or maybe not..Was there any significance to the people on the elevator when Olivia passed to Bell's reality?

Geez! I love the concept of alternate realities.. I always wanted another season of Sliders (whispered*)!

I never really saw the beginning episodes of fringe, but I did watch the finale and I thought is was pretty dang cool. I was at home by myself listening to Linkin Park, (the song was called "By Myself" if you believe in coincidences) when I walked into another room and saw what was on the TV. Just like that, I was hooked and I watched the finale. So awesome how that karma works like that.

I absolutly agree on John Noble performance in that episode. He work has become brilliant over the course of the season.

I did have a feeling Peter had died. I recalled a previous episode were Walter had mentioned a lake accident. He confessed that he couldn't save couldn't save Peter.

Peter reassured Walter that he did and due to his memory he was mistaken. So up till this point I thought Peter was a clone. It does make sense why his mother went crazy. All the while Peter blaming his father for her metal determination. Her son dies, Walter replaces him and she can't seem to readjust and accept this.

Wow! what an awesome season finale!

Now Fringe is taking its own direction (or directions) with these twists and I love it!

Anyone else got the Alias sense when William Bell appeared all shady and said "I have waited a long time for this"? It was a clear homage to Irina Derevko showing all shady saying: "I have waited almost 30 years for this" at the end of Alias Season 1.

Great comments! I don't see a release date for Fringe S1 on DVD, but it's listed on Amazon for pre-order.

Love the idea of *our universe actually being the alternative one - and who's to say which is real? The one you're in is the real one. It's a real mind-twister!

It also explains Olivia *seeing John Scott after he'd died. Remember when he was giving her all of these clues, but then he would disappear. Maybe the other John Scott found a way to go back and forth between the two. But his body from this one was being held at Massive Dynamic. Do we know what happened to it? Is it still there? Maybe they're doing experiments on the near-identical people in the two different universes.

Definitely a lot to think about. I'll write another post with all of your theories and observations. That'll be fun!