Where We Left Off: About all that … someone mind explaining it to us? So much crazy goodness went down, including the two universes colliding and that whole Peter ceasing to exist business, as this show continues to mystify and amaze us.

What's Next: Astrid’s got a gun! Olivia shows off some new powers! And Seth Gabel’s Lincoln Lee is now a full-time castmember in both universes. But with the big Joshua Jackson question marks remaining, we can only expect to see very different sides of all the characters, how they would’ve been without the existence of Peter Bishop.

Season 4 premieres Fri., Sept. 23, 9PM ET on Fox