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Peter Dyneley as Jeff Tracy / Lord Silton / Longman (voice) |
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Shane Rimmer as Scott Tracy / Carter (voice) |
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David Holliday as Virgil Tracy (voice) |
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Ray Barrett as John Tracy / Lovegrove (voice) |
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David Graham as Gordon Tracy / Brains / Parker / Kyrano / Lambert / Light-Fingered Fred / Taylor / Moore / Barrett / Policeman (voice) |
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Matt Zimmerman as Alan Tracy (voice) |
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Sylvia Anderson as Lady Penelope / Lil (voice) |
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Christine Finn as Tin-Tin / Grandma (voice) |
| Writing | Dennis Spooner | Teleplay |
| Production | Gerry Anderson | Producer |
| Production | Reg Hill | Associate Producer |
| Sound | Barry Gray | Music |
| Editing | Harry Ledger | Editor |
| Editing | Len Walter | Supervising Editor |
| Art | Bob Bell | Art Direction |
| Art | John Blundall | Sculptor |
| Art | John Brown | Sculptor |
| Art | Grenville Nott | Assistant Art Director |
| Sound | Maurice Askew | Sound |
| Sound | Roy Lafbery | Dialogue Editor |
| Sound | Tony Lenny | Sound Editor |
| Sound | John Peverill | Supervising Sound Editor |
| Sound | John Taylor | Sound |
| Crew | Brian Johnson | Special Effects |
| Directing | David Elliott | Director |
| Camera | John Read | Director of Photography |
| Crew | Derek Meddings | Special Effects |
| Crew | David Mitton | Special Effects |
| Crew | Harry Oakes | Lighting Camera |
| Crew | Michael Wilson | Lighting Camera |
| Visual Effects | Peter Aston | Modeling |
| Camera | Jimmy Elliot | Camera Operator |
| Crew | Julien Lugrin | Lighting Camera |
| Camera | Geoff Meldrum | Camera Operator |
| Costume & Make-Up | Elizabeth Coleman | Wardrobe Coordinator |
| Directing | Gerry Anderson | Script Supervisor |
| Directing | Sylvia Anderson | Script Supervisor |
| Writing | Alan Pattillo | Script Editor |
