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.

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.

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.

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.

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.

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

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.

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

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.

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.

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