Well, it's finally revealed what I have suspected for quite some time now. Eradicating The Observers from existence will reset everything, which means that Etta will be coming back and reunite with Peter and Olivia. What I didn't expect (but make sense now that I think about it) is that in order for any of this to work, Walter will have to make the ultimate sacrifice with his life. He needs to go out like a Hero and basically redeem himself for some of the things that he did in the past, in effect resetting his mistakes that he more or less brought about through his tampering of worlds and parallel universes. Big reveal is that we find out that the little Boy (Michael) is actually September's Son and that by send him into the future, it will change everything. I wasn't expecting him to be caught by Windmark at the end of the episode. Well, he wasn't caught as the boy gave himself up willingly. So, me thinks the boy has something planned.........