Well, this is really weird. I wonder if we're going to have a continuation of this episode another episode from now. So, we'll shift into a PRESENT and FUTURE alternating, similar to the universe flipping of season 3.
I think that's what's going to happen and I'm going to love it.
This episode was just as good as I hoped it to be. John Noble's performance of a more-brain-damaged-than-usual Walter and a Walter with all his mental faculties fully renewed was compelling. I had a feeling the blonde agent was either Peter and Olivia's daughter or Olivia after she died and resurrected herself as a younger version of who she was like Doctor Who. I love the Simon character and the dark reveal of the reason behind the Observers planting themselves in humanity's past.