Ben heads on an international mission with Vance to seek a clue that may finally unlock the mystery of Flight 828. An intense calling leads newlyweds Michaela and Zeke on an adventure of their own. Saanvi attempts to forget her past sins.

While in pursuit of criminals, Michaela is sidelined by devastating news. Ben teams up with a gifted 828er to aid a young teen. As Grace confronts ancient family wounds, Olive explores ancient mythology in hopes of helping all the passengers.

Ben and Saanvi join forces with Vance in his newest venture to understand Flight 828. Michaela and Zeke adjust to their new home life together, but they pivot to aid a non-passenger with a looming death date of their own.

Michaela’s premonition leads her to pursue a fugitive. Ben tries to gain the trust of an unlikely ally. Olive’s relationship with Levi leads to a fascinating discovery. Jared and Drea uncover devastating secrets. Saanvi finds herself faced with a dilemma that may jeopardize the Eureka project.

Jace zeroes in on Cal's location as others try to prevent a tragedy. A missing piece of the parchment leads to a surprising revelation.

Mick questions Ben's developing relationship with Eureka. A new adversarial group suspicious of Ben takes drastic measures to gain answers. Saanvi proves her worth through a scientific breakthrough. Angelina reaches a breaking point.

As Mick and Ben join forces to aid a desperate Flight 828 passenger, Saanvi grapples with a discovery at Eureka, and the burden of secrecy that comes with it. Grace and Angelina's bond deepens. A maturing Cal enlists Zeke's help in a personal matter.

Ben reunites with a duplicitous foe. Michaela and Zeke's dinner party with Jared and his new girlfriend is halted by a calling that ignites the Stone siblings to save the life of one of their own. Olive's friendship with Levi blossoms but is tested.

Ben’s pursuit of a vulnerable Passenger’s Calling lands him in the crosshairs of an enemy. Michaela unearths a dangerous arsenal of 828 hate. A seemingly natural disaster leads Saanvi to make a bold move. Angelina puts her connection with Eden to a dangerous test.

The consequences of Ben's actions tests his marriage and sends Grace reeling. Michaela makes a difficult decision regarding Saanvi's secret. Cal, following his intuition, provides secret refuge to an outcast.

The Stones are reunited with Olive, yet their happiness is quickly interrupted when Cal runs away. As Michaela struggles to help the passengers avoid a deadly threat, her relationship with Jared sours over mistrust.

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.