 Will SmithSelf - Host (archive footage) | Self - Host (archive footage) |
| FFelipe Gómez GómezSelf - Astrophysicist (archive footage) | Self - Astrophysicist (archive footage) |
| HHeïdi SevestreSelf - Glaciologist (archive footage) | Self - Glaciologist (archive footage) |
 Chris HadfieldSelf - Astronaut (archive footage) | Self - Astronaut (archive footage) |
 Mae JemisonSelf - Astronaut (archive footage) | Self - Astronaut (archive footage) |
| RRosa Maria dos SantosSelf - Climatologist (archive footage) | Self - Climatologist (archive footage) |
| KKidane BelaySelf - Salt Trader (archive footage) | Self - Salt Trader (archive footage) |
| NNelson GadeaSelf - Head Doctor, La Rinconada (archive footage) | Self - Head Doctor, La Rinconada (archive footage) |
| JJerry LinengerSelf - Astronaut (archive footage) | Self - Astronaut (archive footage) |
 Jeffrey A. HoffmanSelf - Astronaut (archive footage) | Self - Astronaut (archive footage) |
| BBeth WhitsonSelf - Peggy's Mother (archive footage) | Self - Peggy's Mother (archive footage) |
| KKeith WhitsonSelf - Peggy's Father (archive footage) | Self - Peggy's Father (archive footage) |
| PPak NaspinSelf - Freediver (archive footage) | Self - Freediver (archive footage) |
| PPeggy WhitsonSelf - Astronaut (archive footage) | Self - Astronaut (archive footage) |
 Nicole StottSelf - Astronaut (archive footage) | Self - Astronaut (archive footage) |
 Michael J. MassiminoSelf - Astronaut (archive footage) | Self - Astronaut (archive footage) |
| AAbel MéndezSelf - Planetary Astrobiologist (archive footage) | Self - Planetary Astrobiologist (archive footage) |
| LLeland MelvinSelf - Astronaut (archive footage) | Self - Astronaut (archive footage) |