As the Stone family reels in the aftermath of a devastating shooting, they’re hit with their most foreboding Calling yet, sending Ben on a mission to locate two Flight 828 passengers who have mysteriously gone missing. Grace grapples with her new pregnancy, the Major attempts to tighten her grip on the unwitting Saanvi, all while the clock on the lives of the 828ers continues to tick towards zero.

Ben forms an alliance with a student from Flight 828, whose callings either uncovered a violent crime or helped him commit one. As Saanvi strives to further her research into the death date, Grace makes a startling discovery about her pregnancy.

The Stone Family struggles to unlock their mysterious wave of frightening 828 callings, while the person who may be key to solving them is trapped behind bars. Meanwhile, a shocking and disturbing incident leads Grace to suspect a local mom is in danger.

Michaela is pushed into the midst of a high-stakes bank robbery perpetrated by a mystery assailant. As Ben and TJ piece together an arcane set of mythological clues, Adrian draws Olive further into the world of the Believers.

When Grace and Cal are involved in a suspicious hit-and-run, Ben is determined to get to the bottom of it. Michaela investigates a brutal attack at the Church of the Believers, but finds her efforts stymied by Adrian's refusal to cooperate. Zeke is tested when he tries to make amends with someone from his past.

Ben and Saanvi work together to orchestrate a surprising family reunion for an emotionally closed-off Flight 828 passenger. Meanwhile, Olive drifts further away from her family, Jared learns more about a growing cabal of anti-828 sentiment, and Michaela finds herself out on a limb when baggage from Zeke's past threatens to destroy his tenuous new life.

Tensions flare as the passengers of Flight 828 finally come to understand the meaning of their increasingly terrifying callings. Afraid of losing his daughter to the Church of the Believers, Ben confronts Adrian. Zeke challenges Michaela's trust, and Saanvi seeks help from an old flame.

In the wake of a devastating tragedy, Ben tries to connect with a despondent Olive. Michaela questions Jared's loyalties, and Saanvi shares a medical breakthrough that could change the course of all their lives.

As a storm rages outside the Stone home and anxieties boil over inside, Olive frantically searches for meaning in a centuries-old text. Meanwhile, Michaela faces unexpected scrutiny at work, and Zeke comes to Saanvi's aid when her lab research takes a dangerous turn.

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.

Ben is drawn to help absolve a passenger of his guilt, while Saanvi enlists help in protecting herself from the Major. Jared and Drea attempt to extract a confession from a trio of ruthless meth dealers who would do anything to exact revenge on Michaela.

Michaela and Ben put everything on the line to attempt a daring rescue. As the final hours of Zeke's life approach, Saanvi and Vance make a last-ditch effort to appeal to the Major, who may be the only person who can save him from his Death Date. Season finale.