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

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

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.

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