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

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

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

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

The crew follow Jeanne's footsteps.

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

The survivors race for Zillion 2, but neither Gemma nor Goldstein (her boss on Earth) have rescue in mind. Simon decides to try anything to join Zillion 2 before the storm falls on them but Gemma refuses to take them with her; Meyer tries to convince her with the unexpected help of Jeanne. The mission is far from over…

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.

Sam and Alan raise questions about the origin of the portal; Jeanne is determined to return to Earth, but must search for someone first.

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.

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.

Is Komarov the 'unicorn' Earth-bound billionaire Goldstein hunts? As Jeanne leaves the spaceship to reach Thaumasia, Gramat tries a desperate gambit to regain the initiative on Mars, following her with Gemma as a hostage. Zillion's soldiers arrive to seize Komarov but Alessandra does not let them in. Yann is now alone against all.

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

While Jeanne must pick her path, Peter wavers about helping her. Alice pushes for teamwork despite having the most to lose.

Caught in a predicament, Jeanne is overwhelmed by the memories of her father. In Moscow in the 1960s, Vladimir Komarov is told that the Soyouz mission is doomed to failure. Meanwhile, the crew of Odysseus are encountering more and more problems with the Americans.

The first manned mission to Mars is now approaching the red planet. The crew includes top-flight scientists and a young female psychiatrist, responsible for their mental health. But just as they are about to land, something goes wrong.