This was dreadful. Walter's mad act is tired. There's a return from the nasty loony bin director (Bill Sadler) who as last sighted back in season 1. It turns out Peter did exist in this new reality, it is just that after Walter stole him, he fell through the ice and drowned. Somehow Walter has escaped all censure for abduction, manslaughter and parallel universe war mongering.
Why have we not yet got a Walter/Walternate confrontation? Instead we get two bullies dying after a close encounter with some Lovecraft like fungi. Walter bonds with a moppet and goes large ham. Dial it down John Noble, you aren't getting an Emmy. Where is Nina Sharp? Will Lincoln Lee shut up? This is stupid, awful and full of bad over acting.