The Observers (i.e., Bald Guys) decided to erase Peter from existence during last year's season finale. Apparenly they originally "put him there" to serve a purpose (which I assumed to mean having Walter/Walternate punch holes between the parallel universes) only to get rid of Peter---with nobody having memories of him---since he was no longer needed. Okay, assuming the viewing public buys into this hogwash...the writers would need to explain how they arrived at their current state of affairs since Peter never existed?
If that's not bad enough...somehow Walter is seeing images of Peter (we'll call them Peter Tracks
![Roll Eyes :rolleyes: :rolleyes:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
) in mirrors and television sets...and he is frightened by them. Moreover, Walter keeps complaining that "something is askew" (e.g., he keeps asking if someone has altered the temperature, humidity, etc. in the lab) but he can't put his finger on the change. To top it all off, the Bald Guy is building a widget of some sort from old vacuum tubes that---from what I could gather---will completely erase Peter from existence. I guess he only deleted Peter and now he's having to perform a wipe-disk, so to speak.
Confused? Join the crowd! The Observers need to bring Peter back and have everything go back to normal, or paranormal, just like the season finale never existed. In other words, they need to perform a reverse Peter Pulling.
![Big Grin :D :D](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)