10,000 meters (S04E03)

While overseeing the transportation of a serial killer back to his home country, Raphaëlle experiences a shocking turn of events when he suddenly dies mid-flight due to an unexplained decompression incident. With Astrid assisting her from the ground over the phone, Raphaëlle uncovers evidence suggesting that this was no accident but rather a deliberate murder, and the assassin is likely hiding among the other passengers on the plane.