This pretty much confirms everything I've suspected since the end of last season, but it was very well told.
Seeing 1985 Walter was great. He's so different, but so much the same.
Peter Freakin' Woodward as an Observer! I *so* hope we get to see more of him on this show.
It was really good how they picked up on so many threads they've laid down over the two years, and wove them all together. Raiden Lake, Peter's...everything, the coin, the other side, the 'car crash' into the water, Peter's nightmares of being taken. It all works very well together.
They've explained so much, and there's still so much unanswered, I really can't wait to see where the series goes from here.
The Back to the Future gag was just awesome.