| Episode | Credits |
Cast[]
- Martin Landau as Commander John Koenig
- Barbara Bain as Dr. Helena Russell
- Barry Morse as Professor Victor Bergman
- Clifton Jones as David Kano
- Zienia Merton as Sandra Benes
- Nick Tate as Alan Carter
- Prentis Hancock as Paul Morrow
- Paul Jones as Mike Ryan
- Jon Laurimore as Smitty
- Margaret Leighton as Arra
- Anton Phillips as Dr. Bob Mathias
Uncredited[]
- Tony Allyn as Security Guard
- Vic Armstrong, Loftus Burton, Andy Dempsey, Annie Lambert, Marc Zuber , Chai Lee and Michael Stevens as Main Mission Operatives
- Sarah Bullen as Operative Kate
- Jan Harvey as Alpha News Service Girl
- Quentin Pierre as Pierce Quinton
- Suzanne Roquette as Tanya Aleksandr
- Vincent Wong as Toshiro Fujita
Crew[]
- Directed by Ray Austin and Lee H. Katzin
- Written by Anthony Terpiloff and David Weir
- Produced by Gerry Anderson (Executive Producer) and Sylvia Anderson (Producer)
- Music by Barry Gray
- Cinematography by Frank Watts
- Film Editing by Mike Campbell and Alan Killick
- Post-Production Editor: Gunter Glinka
- Supervising Editor (As Dave Lane): David Lane
- Post-Production Coordinator: Robert Mandell
- Casting by [[Michael Barnes
- Production Design by Keith Wilson
- Costume Design by Rudi Gernreich
- Hair Designer: Helene Bevan
- Makeup Artists: Ann Cotton and Basil Newall
- Production Manager: Ron Fry
- Assistant Director: Ken Baker
- 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
- Camera Operator: Neil Binney
- Wardrobe: Eileen Sullivan
- Music Associate: Vic Elms
- Music Editor: Alan Willis
- Script Editor: Johnny Byrne
- Continuity: Gladys Goldsmith
- Script Consultant: Christopher Penfold