I've always read this thread to see what theories you guys have and what not, but I usually just sit back and enjoy the show. Since the 2nd half of season one, I haven't really had anything to complain about.
But this past episode was bad. It's like they flew through several episodes-worth of plot points, so it felt sort of like a jumbled mess. I usually just go along with what Walter says when he comes up with explanations, but for some reason I didn't buy it at all this time around. Combine that with the Real Steel puppetry, Olivia and Peter going to that location without backup (what the what?), and Alex and Walter's horrible B-movie action sequence, and I was laughing for all the wrong reasons.
Hopefully the next episode makes up for it. One bad episode out of dozens is pretty remarkable, but it sure would have been an assy way to close out the series.