When Xavier’s attempt to publicize his apocalypse theory gets him arrested, Evie begins to wonder if her crazy fun new boyfriend is actually just plain crazy.

Over Here Astrid gets an unexpected visit from her Alternate, while Peter and Olivia track a killer using a toxin that has yet to be invented. Both universes collide in…

The dying Observer comes to see Walter and Peter, who must take extreme measures to learn what secrets he hides and determine if he knows where Olivia is. Meanwhile, David…