After a distressing chain of events, Thea and Mathieu lead a search for a new plane, and the officers plot their revenge on Sylvie.

At the bunker, the trial soon gives way to more twisted schemes. The group searching for seeds encounters a disoriented stranger.

Just as the passengers settle into the rhythms of life in the bunker, a sudden food shortage forces them to consider making another risky journey.

As Thea and team attempt to lure Gia out of the vault, Ines searches for a way back into the bunker, and Rik confides in the ambassador.

With the generator shut down, temperatures and tempers soar, sparking a tense standoff. The Colonel finds a damning piece of evidence at the air base.

As the group deals with a series of mechanical crises, Terenzio challenges Mathieu's authority, and Horst makes contact with another plane.

Mechanic Jakub clashes with the others about what to do next. A Wi-Fi signal brings troubling new intel on the disaster — and on some of the passengers.

The mission to NATO headquarters takes a dramatic turn. Laura and Horst tend to a medical emergency. Jakub and Osman race to solve the fuel problem.

The crisis aboard the plane threatens to leave the travelers stranded. Fearing for their lives, Sylvie and the others hatch a plan to flee the bunker.

When an armed man storms her late-night flight to Moscow, former military pilot Sylvie finds herself pulled into the cockpit to help.

Rik organizes a hasty trial to decide Ayaz's fate, Terenzio reveals rumors of a NATO refuge, and Sylvie begins to worry about Mathieu's state of mind.

Emotions run high as the group makes one last desperate bid to reach safety before dawn breaks.