Follows a simulation of what it might be like to be an astronaut on Mars, with celebrity contestants competing to be the last one standing, the "celebronaut."
Cast: William Shatner, Natasha Leggero, Tallulah Willis, Ronda Rousey, Tom Schwartz, Tinashe, Porsha Williams, Adam Rippon, Marshawn Lynch, Lance Armstrong, Richard Sherman, Ariel Winter, Christopher Mintz-Plasse
The remaining crewmates must correctly answer trivia questions from the hab manual and advance to the final challenge, where they must properly assemble a satellite tower and broadcast a personalized message to Earth.
With only six celebronauts left, the mission on Mars is almost complete; the hab detects a weak distress signal that the crew must investigate immediately; they need to split up into two teams to find the source of the distress signal.
The seven remaining celebronauts must find the hab's missing house pet, Raddog.
The hab's radar system has detected an unfamiliar signal inside the habitat; someone or something is co-existing with the crewmates and could threaten their survival if they don't act fast.
Life on Mars is never easy! A series of solar flares have interfered with the electronics in the hab and the 9 remaining celebronauts will need to repair the solar panels, working fast before another solar flare brings dangerous radiation.
A technological virus has taken over the artificial intelligence system in the hab, and two celebronauts are stuck outside in the harsh Martian climate. The hab's AI could sabotage the entire mission if the 11 remaining celebronauts don't act fast.
Four new crew members land on Mars, but their supply craft goes off course and crashes.
Our 10 remaining contestants must brave the elements of the brutal Martian desert to find out who has what it takes to survive when an unexpected fire breaks out in the hab.
Just as they were settling into life on the red planet, the remaining celebrities must figure out how to replenish their water supply.