| Episode | Credits | Transcript |
Cast[]
- Martin Landau as Commander John Koenig
- Barbara Bain as Dr. Helena Russell
- Barry Morse as Prof. Victor Bergman
- Richard Johnson as Lee Russell
- 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
- Stuart Damon as Parks
Uncredited[]
- Tony Allyn, Jeremy Anthony, Loftus Burton, Andy Dempsey, Alan Harris, Chai Lee and Christopher Matthews as Main Mission Operatives
- Melita Clarke as Main Technician
- Saad Ghazi as Medic
- Barbara Kelly as Computer Voice
- John Oxley as Bannion
- Quentin Pierre as Pierce Quinlon
- Shane Rimmer as Voice of Bannion
- Suzanne Roquette as Tanya Aleksandr
Crew[]
- Directed by Charles Crichton
- Written by Art Wallace and 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: Ann Cotton
- 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 Maker (Uncredited): Andrew Kelly
- Camera Operator: Neil Binney
- Costumes: Moon City: Rudi Gernreich
- Wardrobe: Eileen Sullivan
- Music Associate: Vic Elms
- Music Editor: Alan Willis
- Script Editor: Edward Di Lorenzo (Credited as Edward Di Lorenzo)
- Continuity: Gladys Goldsmith
- Drivers (Uncredited): Ray Atkins, Steve Smith and Doug Wetherley
- Cutting Room: Frederick Buckman
- Story Consultant: Christopher Penfold[1]