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

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

A joint mission brings about conflict between crew members.

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.

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

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

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