Ian Butcher

David must choose between Kathryn and Mary Margaret, with whom he's fallen deeply in love; Sheriff Graham is caught in a lie; Prince Charming's destiny is altered.

Kiera and Carlos's reunion is a bumpy one as they attempt to thwart Liber8's brazen rescue of Travis during a prison transfer. Meanwhile, Kellog approaches Alec with an enticing partnership proposition. The young genius is tempted, but will it lead him down a dark path?

As time dramatically ticks down, Peter, Olivia and Walter stop at nothing to save the universe from Observer rule. Walter enters the infamous deprivation tank in an attempt to uncover a key piece of information about the mysterious figure, Donald. Meanwhile, Captain Windmark sets out on a revealing mission of his own as long-standing questions are answered.

As Peter, Olivia, Astrid and Walter scramble to tap into a key piece of the puzzle to defeat the Observers, they enlist the aid of Nina Sharp who conjures up a plan.

Anna introduces her pilot program to invite select groups of humans to stay on each of the 29 spaceships, and Ryan must deal with the fact that Valerie's pregnancy is wildly accelerated. Plus, Tyler learns a secret about his mom, Erica, and someone makes a sacrifice to save Ryan. Recurring guest star DAVID RICHMOND-PECK appears as Georgie.