| Episode | Credits | Transcript |
Cast[]
- Martin Landau as Commander John Koenig
- Barbara Bain as Dr. Helena Russell
- Barry Morse as Prof. Victor Bergman
- Joan Collins as Kara
- Dennis Burgess as Neman
- Aubrey Morris as Petros High Priest
- Prentis Hancock as Paul Morrow
- Clifton Jones as David Kano
- Zienia Merton as Sandra Benes
- Nick Tate as Alan Carter
- Paul Antrim as Bill Lowry
- Robert Russell as Hadin
- Gerald Staddon (Credited as Gerald Stadden) as Male Mute
- Jackie Horton as Female Mute
Uncredited[]
- Binu Balani, Loftus Burton, Andy Dempsey and Michael Stevens as Main Mission Operatives
- Sarah Bullen as Operative Kate
- Jenny Cresswell, Louise Jameson and Ron Tarr as Survivors
- Joe Dunne as Security Guard
- Linda Hooks as Darian
- Ann Maj-Brit as Main Mission Operative Ann
Crew[]
- Directed by Ray Austin
- 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: 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: 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
- Matte Artist (Uncredited): Ray Caple
- Camera Operator: Neil Binney
- Assistant Camera (Uncredited): Mike Tomlin
- Costumes: Moon City: Rudi Gernreich
- Wardrobe: Eileen Sullivan
- Associate: Vic Elms
- Music Editor: Alan Willis
- Continuity: Gladys Goldsmith
- Cutting Room: Frederick Buckman[1]