: The crew struggles to build a permanent shelter to protect themselves from radiation. In the present, the European Space Agency and Roscosmos partner to launch an orbiter.
: The dust storm continues for months, taking a psychological toll on the crew and damaging the habitat's infrastructure.
: The crew must trek across harsh Martian terrain to reach their pre-built base camp after landing off-target. Documentary segments feature astronaut Scott Kelly's year-long mission on the ISS.
: A devastating tragedy occurs at the colony, forcing everyone on Mars and Earth to question the mission's future. Why you might be seeing "Episode 8"