| Episode | Credits | Transcript |
Cast[]
- Martin Landau as Commander John Koenig
- Barbara Bain as Dr. Helena Russell
- Barry Morse as Prof. Victor Bergman
- Jeremy Kemp as Dr. Ernst Linden
- Barry Stokes as Jim Haines
- Prentis Hancock as Paul Morrow
- Clifton Jones as David Kano
- Zienia Merton as Sandra Benes
- Anton Phillips as Dr. Mathias
- Nick Tate as Alan Carter
- Alex Scott as Aarchon
- Lawrence Trimble as Steve Abrams
Uncredited[]
- Tony Allyn as Tony Allan
- Sarah Bullen as Kate Bullen
- Loftus Burton as Lee Oswald
- Andy Dempsey, Michael Stevens and Chris Williams as Main Mission Operatives
- John Clifford as An astronaut
- Maxwell Craig as Astronaut in Corridor
- Alan Harris as Alphan
- Quentin Pierre as Pierce Quinton
- Suzanne Roquette as Tanya Aleksandr
- Anita West, Al Flemyng and Laurie Davis as Technicians
Crew[]
- Directed by Bob Kellett
- Written by Johnny Byrne
- Produced by Gerry Anderson (Executive producer) and Sylvia Anderson (Producer)
- Music by Barry Gray
- Cinematography by Frank Watts
- Film Editing by Derek Chambers (Credited as Derek Hyde Chambers)
- Supervising Editor: David Lane (Credited as Dave Lane)
- Casting by Michael Barnes
- Production Design by Keith Wilson
- Hair Designer: Helene Bevan
- Makeup Artist: Basil Newall
- Production Manager: Ron Fry
- Assistant Director: Ken Baker
- Scenic Artist (Uncredited): Bill Beavis
- Props (Uncredited): John Chisholm
- Sound Recordist: David Bowen
- Sound Editor: Roy Lafbery
- Special Effects Director: Nick Allder
- Electronics: Michael S.E. Downing
- Camera Operator: Frank Drake
- Special Effects: Brian Johnson
- Lighting Cameraman: Harry Oakes
- Model Makers (Uncredited): Andrew Kelly and Martin Bower
- Stunt Double: Martin Landau (Uncredited): Rick Lester
- Camera Operator: Neil Binney
- Costumes: Moon City: Rudi Gernreich
- Wardrobe: Eileen Sullivan
- Associate: Vic Elms
- Music Editor: Alan Willis
- Continuity: Gladys Goldsmith
- Cutting Room: Frederick Buckman
- Story Consultant: Christopher Penfold