Oded Fehr as Eitan Hafri James Ransone as Nick Fletcher, one of five astronauts chosen to be the first people to colonize mars. Hannah Ware as Sadie Hewitt, one of five astronauts chosen to be the first people to colonize mars. Anna Jacoby-Heron as Denise, Tom's daughter Keiko Agena as Aiko Hakari, one of five astronauts chosen to be the first people to colonize mars.