Ellis's plan hits a snag, just in time for some sleepless delirium to settle in.

Ellis heads for Dallas; Ally, Jake, and Sam are diverted by a new kind of foe.

New clues converge in Dallas, while Ally attempts a dangerous reunion in Austin.

Lex shows her research to Ally; Ellis investigates a mysterious signal.

Alliances at Dr Abrams's facility are pushed; Ellis's group puts their theory to the test.

Ellis finds his way to an aerodrome and meets Aiden, who is being held at gunpoint and made to fly a light plane.

The team hunts for Gabbi and any chance to track down the Safe Sleep Zone, as Aidan and a new ally attempt to enter the Sandman's Oasis.

Aidan and Paula check out their new home and the others deal with a group of maniacs who has a unique way of staying awake.

The group finds itself on a plane piloted by Ellis, who tries to hide his mental state from the others; Abrams reveals why he no longer works in the facility.

The team pursues the Oasis through the desert, as Aidan navigates the politics of the camp; Meredith finds an unlikely ally in her new assignment.

As the fractured teams close in on the camp, a chance encounter pushes one hero to the breaking point; Aidan's actions at the Oasis have unexpected consequences.