| Name | Character | Episodes |
|---|---|---|
| Will Smith | Self - Host | 10 |
| Chris Hadfield | Self - Astronaut | 10 |
| Mae Jemison | Self - Astronaut | 8 |
| Michael J. Massimino | Self - Astronaut | 5 |
| Nichelle Nichols | Self | 1 |
| Chris Hadfield | 0 |
| Name | Character | Episodes |
|---|---|---|
| Will Smith | Self - Host | 10 |
| Chris Hadfield | Self - Astronaut | 10 |
| Mae Jemison | Self - Astronaut | 8 |
| Michael J. Massimino | Self - Astronaut | 5 |
| Nichelle Nichols | Self | 1 |
| Chris Hadfield | 0 |