| Episode | Credits | Transcript |
Cast[]
- Martin Landau as Commander John Koenig
- Barbara Bain as Dr. Helena Russell
- Barry Morse as Prof. Victor Bergman
- Roy Dotrice as Commissioner Simmonds
- Prentis Hancock as Paul Morrow
- Zienia Merton as Sandra Benes
- Anton Phillips as Dr. Bob Mathias
- Nick Tate as Alan Carter
- Philip Madoc as Commander Gorski
- Lon Satton as Benjamin Ouma
- Eric Carte as Collins
Uncredited[]
- Tony Allyn, Maxwell Craig and Joe Dunne as Security Guards
- Quentin Pierre as Pierce Quinton
- Loftus Burton, Chai Lee, Christopher Matthews, Valerie Van Ost, Norma West and Paul Weston as Main Mission Operatives
- Laurie Davis as Stewardess
- Don Fellows as GTV Newscaster
- Alan Harris as Alphan
- Alf Joint as Steiner
- Barbara Kelly as Computer (voice)
- Shane Rimmer as Eagle Pilot (voice)
- Suzanne Roquette as Tanya Aleksandr
- Roy Scammell as Jim Nordstrom
- Nik Zaran as Astronaut Jackson
Crew[]
- Directed By Lee H. Katzin
- Written By George Bellak
- Produced By Gerry Anderson (Executive Producer) and Sylvia Anderson (Producer)
- Music By Barry Gray
- Cinematography By Frank Watts
- David Lane: Supervising Editor (As Dave Lane)
- Geoffrey Mackrill: Assistant Editor (Uncredited)
- Casting By Michael Barnes
- Production Design By Keith Wilson
- Helene Bevan: Hair Designer
- Basil Newall: Makeup Artist
- Ron Fry: Production Manager
- Ken Baker: Assistant Director
- Bill Beavis: Scenic Artist (Uncredited)
- John Chisholm: Props (Uncredited)
- David Bowen: Sound Recordist
- Chris Munro: Sound Camera Operator
- Peter Pennell: Sound Editor
- Nick Allder: Special Effects Director
- Michael S.E. Downing: Electronics
- Frank Drake: Camera Operator
- Brian Johnson: Special Effects
- Harry Oakes: Lighting Cameraman
- Andrew Kelly: Model Maker (Uncredited)
- Tony White: Camera Operator
- Rudi Gernreich: Costumes: Moon City
- Eileen Sullivan: Wardrobe
- Vic Elms: Music Associate
- Alan Willis: Music Editor
- Edward di Lorenzo: Script Editor
- Gladys Goldsmith: Continuity
- Christopher Penfold: Story Consultant[1]