- David Graham - Gordon Tracy / Brains (voice)
- Christine Finn - Tin-Tin Kyrano (voice)
- Christine Finn - Tin-Tin Kyrano
- Peter Dyneley - Jeff Tracy
- Shane Rimmer - Scott Tracy
- Shane Rimmer - Reactor Control Assistant (voice)
- Paul Maxwell - Captain Paul Travers
- Sylvia Anderson - Lady Penelope Clayton Ward
- Ray Barrett - John Tracy
- Ray Barrett - Atom Sub Reefer Captain / TV Reporter (voice)
- Ray Barrett - Jansen (voice)
- Ray Barrett - Colonel Harris / Colonel Benson (voice)
- Ray Barrett - Dr. Orchard (voice)
- Matt Zimmerman - Alan Tracy (voice)
- Matt Zimmerman - Lieutenant Jensen (voice)
- Matt Zimmerman - Banino / Macklin / Foreign Lieutenant (voice)
- Matt Zimmerman - Atom Sub Reefer Lieutenant (voice)
- Matt Zimmerman - TV Reporter (voice)
- Matt Zimmerman - Franklin / Gutierrez (voice)
- Matt Zimmerman - Press Officer / 2nd Reporter (voice)
- Matt Zimmerman - Hector McGill (voice)
- John Tate - McColl / Security Guard (voice) (uncredited)
- John Tate - Various Characters (voice) (uncredited)
- John Tate - Frank Hooper / Sir Harry (voice) (uncredited)
- John Tate - Blackmer (voice) (uncredited)
- John Tate - Solarnaut Camp (voice) (uncredited)
- John Tate - Maxie / Scheiler / Foreign Colonel (voice) (uncredited)
- Reg Hill
Paul Maxwell interpreta a Captain Paul Travers en la serie.
Peter Dyneley interpreta a Jeff Tracy en la serie.
Matt Zimmerman interpreta a Alan Tracy (voice) en la serie.
Shane Rimmer interpreta a Scott Tracy en la serie.
Ray Barrett interpreta a John Tracy en la serie.
Sylvia Anderson hace el papel de Lady Penelope Clayton Ward.
David Holliday interpreta a Virgil Tracy (voice) en la serie.
David Graham hace el papel de Gordon Tracy / Brains (voice).
Christine Finn hace el papel de Tin-Tin Kyrano (voice).
Capítulo disponible en las siguientes plataformas:
