Barrett and Grover discover a disturbing conspiracy. Those trapped in the fallout shelter might have found an escape route.

Cast: Leo Howard, Liza Koshy, Adam Hicks, Meghan Rienks, Tyler Chase, Niki DeMartino, Saxon Sharbino, Amanda Steele, Jake Busey, Brant Daugherty, Tati Gabrielle, Jordan Calloway, Nicola Lambo, Clinton Thompson