Ben and Saanvi undertake a treacherous mission. Michaela and Zeke race to stop a passenger before his actions turn deadly. Jared and Vance's team up reveals secrets that could upend their lives.
Tensions flare as the passengers of Flight 828 finally come to understand the meaning of their increasingly terrifying callings; Ben confronts Adrian; Zeke challenges Michaela's trust.
Passengers onboard a flight that returns five years after vanishing must piece together their old lives, and deal with mysterious voices in their heads.
Griffin schemes to take the callings public; Tensions between Jared and Zeke reach a boiling point; Ben, Grace, and Olive make a devastating discovery.
When Grace's pregnancy complicates the pursuit of a calling, Ben finds himself working alongside an uneasy new ally. Michaela tries to make amends with Jared, and the X'ers set their sights on Zeke.