After a harrowing ordeal, OA and Karim find themselves locked inside a labyrinth of puzzles. Nagging doubts prompt Homer to snoop on Dr. Percy.

Cast: Brit Marling, Emory Cohen, Kingsley Ben-Adir, Will Brill, Patrick Gibson, Jason Isaacs, Irène Jacob, Zendaya, Vincent Kartheiser, Cynthia Mace, Bria Vinaite, Ryan Masson