Nearly 10 years have passed. Danielle and Ed attend a celebration, where things take a terrifying turn.

A commercial spaceflight company makes an announcement. The choice over who'll command the Mars mission leads to a shift in personnel.

As NASA scrambles to prepare for the launch to Mars, Margo is confronted with a harsh personal reality.

A surprise maneuver during the journey to Mars provokes desperate measures.

The race to land first on Mars brings together unexpected allies.

The astronauts move quickly to build Martian bases.

A joint mission brings about conflict between crew members.

After a sudden crisis, the Martian crews pull together.

Plans to leave Mars are complicated by an unforeseen issue.

The Martian crew debates how to save the life of one of their own.

Eight years later, a new mission begins: Capture an asteroid. Aleida and Danielle are still haunted by events from the past.

New Helios employees arrive on Mars as NASA undergoes major changes.

Miles tries to make ends meet. Margo finds herself pulled into a dangerous situation.

An accident on Mars strains relationships, while Miles embarks on a risky venture.

A discovery sends teams across Earth and Mars scrambling for answers.

Unlikely partnerships are formed at a high-stakes international conference.

A group on Mars takes drastic measures. Margo grapples with a new assignment.

Plans are made with interplanetary ramifications. Ed begins working with an unexpected partner.

Things start to go awry just as an important mission approaches a critical juncture.

Tensions on Earth and Mars come to a head.