Just when I thought we were going to get a positive season finale. The other shoe drops now we prepare for the Observer war. This was great episode Walter shooting Olivia and always loved Bells harmonic mode of universe travel can't wait till the fall.
Bell's escape was a little much for me. As soon as he moved towards the bell, I would have shot him. No one told him to stop moving, halt, or nothing at all. They just watched him walk over to the bell, hit in and fade into nothingness.