| Cast | |||
|---|---|---|---|
| Alex Price |  | Narrator |  |
| Karen Gillan |  | Self | |
| Dr. Maggie Aderin-Pocock |  | (Space Scientist) | |
| James Corden |  | Self | |
| Gareth Roberts |  | Self | |
| Catherine Morshead |  | Self | |
| Matt Smith |  | Self | |
| Dan Walker | | Self | |
| Steve Wilson | | Self | |
| Lee Dixon | | Self | |
| Mark Lawrenson | | Self | |
| Marek Kukula | | (Public Astronomer) | |
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