Isaak discovers the events that took place aboard the MIR station 25 years earlier and unlocks the secret of the killer's identity. In the damaged station, covered in frost and soon deprived of oxygen, Anna finds part of the crew and tries to bring everyone back to Earth.

• Stéphane Pannetier
• Thierry Poiraud
• Julien Vanlerenberghe

• Oleg Levin
• Céline Sallette
• Daniyar Alshinov