- Shane Rimmer - Scott Tracy (voice)
- Charles Tingwell - Dr. Tony Grant / Angry Young Man / Public Relations Officer (voice)
- Jeremy Wilkin - Virgil Tracy / Space Exploration Center President (voice)
- Matt Zimmerman - Alan Tracy / Messenger (voice)
- F. Vivian Dunn - Himself (voice)
- Cliff Richard - Cliff Richard Jr. (voice)
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David Lane
- Sylvia Anderson
- Gerry Anderson
- Sylvia Anderson
- John Read
Capítulo disponible en las siguientes plataformas: