| Episode | Credits | Transcript |
Cast[]
- Martin Landau as Commander John Koenig
- Barbara Bain as Dr. Helena Russell
- Barry Morse as Prof. Victor Bergman
- Margaret Leighton as Arra
- 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
Uncredited[]
- Glenda Allen as Nurse
- Tony Allyn as Security Guard Tony Allan
- Vic Armstrong, Loftus Burton, Andy Dempsey, Alan Harris, Annie Lambert and Michael Stevens as Main Mission Operatives
- Sarah Bullen as Operative Kate
- Alf Joint as Alphan on Balcony
- Quentin Pierre as Pierce Quinton
- Suzanne Roquette as Tanya Aleksandr
Crew[]
- Directed by Ray Austin
- Written by Anthony Terpiloff
- Executive Producer: Gerry Anderson
- Producer: Sylvia Anderson
- 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: Bill Beavis
- Props: John Chisholm
- Sound Recordist: David Bowen
- Sound Camera Operator: Chris Munro
- 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: Andrew Kelly and Martin Bower
- Stunt Double for Martin Landau: Rick Lester
- Camera Operator: Neil Binney
- Costumes: Moon City: Rudi Gernreich
- Wardrobe: Eileen Sullivan
- Music Associate: Vic Elms
- Music Editor: Alan Willis
- Script Editor: Johnny Byrne
- Continuity: Gladys Goldsmith
- Story Consultant: Christopher Penfold