I think if either of the Bishops spends any significant face to face time with other-Olivia, she would be discovered pretty quickly, as they are both different enough in terms of their experiences, especially after real-Olivia revealed her feelings for Peter.
I wonder what the observers are up to. We had an episode in the past of an observer altering a sequence of events that they were very insisting on fixing to not influence anything. And then we had an observer leave a piece of paper behind what revealed what Peter's purpose is supposed to be. So are they just observing or carefully crafting an outcome? And who are they?
I wonder how the story would've developed had they not left that piece of schematics behind for Olivia.
I think Fringe has really started to get good the past few weeks. It has almost become very Lost-like, especially the last episode. It seemed like they summed up the whole season of Lost (season 4 I think?) where everything was about fate. The same season where Michael blew up the freighter and finally died. I also swear that I hear some of the music they used on Lost when something is about to happen on Fringe.
Fringe looked to to dying a slow death, but I have noticed the last few weeks have picked up. Fringe is broken into two types of shows. Episodes which follow the full series arc....the two universes, Peter, Walternate, etc. And then these one off episodes where they solve an unrelated case.
I like the larger story arc, and they look to be finishing the season on a strong note. I can't confirm the Lost comparisons, though. Never came to mind.
I find it amazing how the writers will switch worlds for an entire episode; and even spend an entire episode for a flashback. Having Anna Torv doing three characters now is certainly unexpected for me.
I also enjoy the neat things like a "show-me" instead of an identity card; the minimalist ear piece cell phones; nick names like Fauxlivia and Walternate.