A provocative encounter revives traumatic memories for Peter, who seeks to exercise control over Sam’s situation, but fate intervenes.

Vladimir is not all he appears to be as natural disaster threatens the entire mission.

A violent encounter lends urgency to Peter’s quest, while Jeanne’s mistrust increases, despite the reassurances of a companion.

The emotional toll on captive Jeanne makes her dangerously unstable, and a buried memory reveals the troubling truth of a death.

Alice discovers uncomfortable genetic facts, causing emotional confrontations, while Sam’s cause of death is revealed, along with another mystery.

Jeanne is shaken after the failed attempt to hypnotize Komarov enduring memory flashbacks from long ago. Gemma Williams from the Zillion 2 mission arrives and tries to reassure the Ulysse's crew about Goldstein's intentions. Meanwhile, Gramat and Yann find out that Meyer knows a lot more about the mysterious discoveries on Mars than he admits.

Back from Mars alone, Sam finds Earth different from the world he left, so even the limited truths he can share seem insane. Inquisitor Peter Kaminski is intrigued.

Crew members discover traces of life in a strange forest; William Meyer decides to send Sam back to the spaceship.

Jeanne, Simon and Gemma enter the excavated mountain discovering underground monuments and traces of a past life. Inside the ship, the crew members are under the threat of Doisneau and Wayne. Suddenly Irene wakes up.

A child faces a disturbing rite of passage in a strange community living off the beaten track.

While the space ship approaches Mars, Alessandra has new visions. In her community, Jeanne is facing the consequences of Atar's death.

Two new crew members discover each other while organizing a new mission to Mars at the Meyer Space Center.

Meyer realizes it was a mistake to bring his daughter with him; Alan tells Sam to search for Alessandra.

Jeanne encounters a mysterious man who seems to know her well while the Nausicaa mission is about to land on Mars.

Jeanne and Simon discover Komarov on the mysterious glacier who reveals what his mission is while Jeanne learns more about what is required of her, becoming the Z2 crew’s prime target. On the ship, Wayne is now alone against the crew of Ulysses while Alessandra tries to convince him to spare their lives - desperate measures take a terrible toll.

Komarov tells Jeanne that Ivan Goldstein did not lie to her. Once on the other side of the portal, the crew does not know how to react to Alice's revelations. The other side of the portal.

With new-found knowledge, Peter tracks down some familiar faces, until he meets his match and a deadly threat.

Doubts about helping Jeanne arise during the race to a mountain rendezvous. With the future uncertain, will Peter repeat the past?