Da to av astronautene blir syke, finner en av deres stedfortredere ut hva det virkelige formålet med ekspedisjonen er.

A secret element in Storage Pod 4 affects the crew which leads to a dangerous crisis. Meanwhile, Ted's wife Eve Shaw reveals the true nature of the mission to him.

Personal and professional relationships get more intense on Earth and aboard the Antares. In the meantime, the Antares' crew undergoes cellular and psychological transformations which is caused by the unseen power behind the mission.

The Antares crew loses control over power, heat and gravity after a series of system failures and has to face its first major crisis.

The Antares crosses a point of no return and turning back to Earth is no longer an option. In the meantime, each of the crew members has to cope with a personal point of no return.

While getting closer to Venus, some crew members are confronted with memories of past actions and struggle with guilt. When one of them gets into a life-threatening situation, the team unites to save her.

Hallucinations put crew members' lives in danger just as they are about to start a promotional event.

An impending solar flare puts the crew in danger; the strange force in Pod 4 sends out an irresistible siren call.

The crew of the Antares learns about Pod 4 and the real reason for their mission to Venus.

It's election day but the crew aboard the Antares is still processing the news about their real mission on Venus.

The day of the landing on Venus has come. The day that will change their lives eventually.

After landing on the burning surface of Venus, Zoe walks toward a sound only she can hear, drawn by her destiny into almost certain destruction.