This was a great episode, haven't seen the observers in action for awhile. I don't know if the observers are on the other world too. If they are I must of missed that explanation, I'm not shocked why they were setting up a chain of events for Walter but it was exciting to watch the rush on whats going on and whats going to happen. This whole mystery that Peter has to die better start giving some answers, they don't even call him special or unique, unlike Olivia but Peter has to die? It's usually the lead character it happens too.
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