| Episode | Credits | Transcript |
Cast[]
- Martin Landau as Commander John Koenig
- Barbara Bain as Dr. Helena Russell
- Barry Morse as Prof. Victor Bergman
- Gianni Garko as Tony Cellini
- Douglas Wilmer as Commissioner Dixon
- 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
- Barbara Kellerman (Credited as Barbara Kellermann) as Dr. Monique Bouchere
- Michael Sheard as Dr. Darwin King
- Susan Jameson as Professor Juliet Mackie
Uncredited[]
- Tony Allyn as Security Guard Tony Allan
- Sarah Bullen as Operative Kate Bullen
- Loftus Burton, Andy Dempsey and Michael Stevens as Main Mission Operatives
- Ann Maj-Brit as Main Mission Operative Ann
- James Fagan as Ken Johnson
- Quentin Pierre as Pierce Quinton
- Robert Rietty as Voice of Cellini
- Suzanne Roquette as Tanya Aleksandr
- Bob Sherman as Newscaster
- Gypsie Kemp as Nurse
Crew[]
- Directed by Charles Crichton
- Written by Christopher Penfold
- Produced by Gerry Anderson (Executive producer) and Sylvia Anderson (Producer)
- Music by Barry Gray
- Cinematography by Frank Watts
- Film Editing by Alan Killick
- 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: Peter Pennell
- 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
- Camera Operator: Neil Binney
- Assistant Camera (Uncredited): Mike Tomlin
- Costumes: Moon City: Rudi Gernreich
- Wardrobe: Eileen Sullivan
- Associate: Vic Elms
- Music Editor: Alan Willis
- Script Editor: Johnny Byrne
- Continuity: Gladys Goldsmith
- Cutting Room: Frederick Buckman