Een ontdekking zorgt ervoor dat men op aarde en Mars naarstig naar antwoorden zoekt.
Gastrollen:
Casey Johnson(Danny Stevens), Goran Ivanovski(Dr. Dimitri Mayakovsky), Sean Patrick Thomas(Corey Johnson), Jorge Diaz(Victor Diaz), Lev Gorn(Grigory Kuznetsov), Jessica Tuck(Christine Francis), Robert Bailey Jr.(Will Tyler), Larry Clarke(Bill McGann), C.S. Lee(Lee Jung-Gil), Anne Beyer(Louisa Mueller), Shannon Lucio(Amanda Dale), Santiago Veizaga(Javier Diaz), Pipper Rubio(Lily Dale), Coco Day(Sarah Dale), Ezrah Lin(Alex Poletov), Irina Dubova(Olga Poletova), Zylan Brooks(Flight Director Jen Hughes), Alex Cioffi(Tim), Jake Renner(Soviet News Anchor), Dimiter D. Marinov(Ilya Breshov), Myk Watford(Palmer James), Salvador Chacon(Gerardo Ortiz-Niño), Moses Jones(Rich Waters), Brandon Ford Green(Shaun Arlee), Danielle Nottingham(Vera Martil), Ania Bukstein(Tatyana Volkova), Alexander Terentyev(Lev Babanin), Emil Markov(Leonid), Thea Andrews(Zoey Chase), Valeri Ross(Malaika Ayesa), Dustin Ingram(Brandt Darby), Sebastiano Pigazzi(Luka Gurino), Jon Levine(Ron Klain), Sacha Seberg(Dimitri Egotov), Steph Evison Williams(Geraldine Middaugh), Madara Jayasena(Natalie Morioka), Libby Baker(Kate Marsteller), Rami Essa(Ramsey), Ian Gary(Helios Crew Member), Reid Rathore(Off-duty Helios Worker)
