 | Sylvia Anderson als Lady Penelope Creighton-Ward (voice) |
 | Ray Barrett als John Tracy / The Hood (voice) |
 | Alexander Davion als Space Captain Greg Martin (voice) |
 | Peter Dyneley als Jeff Tracy (voice) |
 | Christine Finn als Tin-Tin Kyrano (voice) |
 | David Graham als Gordon Tracy / Brains / Aloysius Parker (voice) |
 | Paul Maxwell als Captain Paul Travers (voice) |
 | Neil McCallum als Dr. Ray Pierce (voice) |
 | Bob Monkhouse als Space Navigator Brad Newman / Swinging Star Compere (voice) |
 | Shane Rimmer als Scott Tracy (voice) |
 | Charles Tingwell als Dr. Tony Grant / Angry Young Man / Public Relations Officer (voice) |
 | Jeremy Wilkin als Virgil Tracy / Space Exploration Center President (voice) |
 | Matt Zimmerman als Alan Tracy / Messenger (voice) |
| F. Vivian Dunn als Himself (voice) |
 | Cliff Richard als Cliff Richard Jr. (voice) |
| David Lane | Director |
| Sylvia Anderson | Writer |
| Gerry Anderson | Writer |
| Sylvia Anderson | Producer |
| John Lageu | Production Design |
| John Read | Associate Producer |
| Keith Wilson | Production Design |
| Len Walter | Editor |
| Barry Gray | Original Music Composer |
| Harry Ledger | Assistant Director |
| Derek Meddings | Visual Effects Director |
