Cast (18)
Will SmithSelf - Host (archive footage)Felipe Gómez GómezSelf - Astrophysicist (archive footage)Heïdi SevestreSelf - Glaciologist (archive footage)
Chris HadfieldSelf - Astronaut (archive footage)
Mae JemisonSelf - Astronaut (archive footage)Rosa Maria dos SantosSelf - Climatologist (archive footage)Kidane BelaySelf - Salt Trader (archive footage)Nelson GadeaSelf - Head Doctor, La Rinconada (archive footage)Jerry LinengerSelf - Astronaut (archive footage)
Jeffrey A. HoffmanSelf - Astronaut (archive footage)Beth WhitsonSelf - Peggy's Mother (archive footage)Keith WhitsonSelf - Peggy's Father (archive footage)Pak NaspinSelf - Freediver (archive footage)Peggy WhitsonSelf - Astronaut (archive footage)
Nicole StottSelf - Astronaut (archive footage)
Michael J. MassiminoSelf - Astronaut (archive footage)Abel MéndezSelf - Planetary Astrobiologist (archive footage)Leland MelvinSelf - Astronaut (archive footage)