| Cast overview, first billed only: |
 | Gary Martin | - | Ato (voice) |
 | Bryan Pringle | - | Roth (voice) |
 | Reece Shearsmith | - | Nik / - (voice) |
 | Steve Pemberton | - | Kaz (voice) |
 | Mark Gatiss | - | Null (voice) |
 | Mel Giedroyc | - | Rea (voice) |
 | Sue Perkins | - | Viro (voice) |
 | Alan Marriott | - | Match Narrator (voice) |
 | Stephen Frost | - | Match Narrator (voice) (as Steve Frost) |
 | Nichola McAuliffe | - | Additional Talent (voice) |
| Sean Barrett | - | Additional Talent (voice) |
| Julia Braams | - | Additional Talent (voice) (as Julia Brahms) |
| Matt Saxton | - | Additional Talent (voice) |
| Lew Coulson | - | Additional Talent (voice) |
| Gary Knight | - | Additional Talent (voice) |
