The 12 celebrities land on "Mars."

The remaining celebrities must figure out how to replenish their water supply.

The 10 remaining contestants brave the elements of the Martian desert when a fire breaks out.

The contestants are sent on a mission which tests their perseverance; two are eliminated.

Four new crew members land on Mars, but their supply craft goes off course and crushes.

Four new celebronauts have landed on Mars amidst a micro-meteorite shower! The meteors have punctured the walls of the hab creating a large number of tiny holes causing the oxygen levels inside the hab to plummet. The 11 celebronauts will need to work together to plug the holes until the hab can be fixed. This mission tests the contestant's endurance and will earn them another mission patch.

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. The crewmates will need to work together to reset the AI software - testing their intelligence and earning them yet another mission patch - before it's too late! Find out if the mission gets accomplished and who is deemed not mission critical.

The nine remaining celebronauts need to repair solar panels damaged by a series of solar flares.

The remaining celebronauts discover they are not alone on Mars; someone or some thing is coexisting with the crewmates and could threaten their survival if they don’t act fast; this mission tests the contestants’ adaptability.

The seven remaining celebronauts must find the hab's missing house pet, Raddog.

The hab detects a weak distress signal that the crew must investigate immediately.

The crewmates must assemble a satellite tower and broadcast a personalized message to Earth.