Will be trying to say this without spoilers, because there are people who haven’t seen it.
Awful. Worst finale since LOST, as both a giant letdown and in terms of writing/directing (so many plot holes, I really couldn’t suspend my disbelief that much). Wish I could go back and not see those last 2 episodes. It really made no sense with the direction they were going in the rest of the season, to undo all that work, and leave everything so ambiguous with Chuck, Sarah, and Casey. I know some people loved it, because now they can imagine things, but I don’t need the writers to end things in order to imagine, I watch the show to see things actually happen, and this was just a total cop-out on their part. The only 2 episodes of the series that I didn’t enjoy.