501 - Fallout
Humans on both Earth and Mars try to make sense of cataclysmic events that have occurred in Planum Australe.
502 - Schism
Crews split apart and take different directions, which could have tragic consequences.
503 - Intercept
Rachel makes a last ditch effort to salvage an Earth-to-Mars mission, while Sam and Paul work on a plan that could change everything.
504 - Pilot
As work resumes and Earth’s refugees get closer to launching for Mars, concerns and debates arise over the new comet-intercept mission.
505 - Exodus
Sam fights fate, while Commander Jiao Li leads the refugees’ attempt to launch from Earth to Mars.
506 - Volunteer
Grave complications arise in Colony One over the upcoming intercept mission, and Mars receives news about the refugees’ launch attempt.
507 - Simulations
The Mars-bound refugees struggle against the clock to train for the most difficult operation of their lives: landing on Mars.
508 - Orbit
Friends old and new reunite in Martian orbit, while Captain Paul Kirsch prepares to lead a one-way mission to intercept the Mars-bound comet.
509 - Dispatch
Crews on Mars and in orbit launch supply drop operations, and prepare for the most challenging operations of their lives.
510 - ARRIVAL
The remainders of the human race attempt three simultaneous landings on the surface of Mars.