Ben (Josh Dallas) and Michaela (Melissa Roxburgh) must confront a dire threat to the passengers' safety when Griffin (guest star Marc Menchaca) schemes to take the callings public. Meanwhile, tensions between Jared (J.R. Ramirez) and Zeke (guest star Matt Long) reach a boiling point, and Ben, Grace (Athena Karkanis), and Olive (Luna Blaise) make a devastating discovery.