| Episode | Credits | Transcript |
Cast[]
- Commander John Koenig - Martin Landau
- Doctor Helena Russell - Barbara Bain
- Maya - Catherine Schell
- Tony Verdeschi - Tony Anholt
- Alan Carter - Nick Tate
- Sandra Benes - Zienia Merton
- Doctor Ben Vincent - Jeffery Kissoon
- Jack Bartlett - Jeremy Young
- Joe Ehrlich - Drewe Henley
- Guido Verdeschi - Stuart Damon
- Dr Shaw - Patrick Westwood
- Diana Morris - Toby Robins
- Louisa - Cher Cameron
- Ken Burdett - Al Lampert
- Prof. Hunter - Billy J Mitchell
- Henry Robert - Sheedy
- Peter Rockwell - Nicholas Young
- Lizard animal - Albin Pahernik
- Command Center Operative Peter Reeves - Robert Reeves
- Command Center operative Jenny Cresswell
- Command Center Operative G Allen - Glenda Allen
- Security Guard Pierce Quinton (Command Center) - Quentin Pierre
- Security Guard in corridor - Roy Everson
- Alien Voice - David Jackson
- Laren
- New York Control (VO)
- Jeanie (Alan's blonde girlfriend) - Janie Love
- Ehrlich's girlfriend
- Caroline (Bartlett's daughter)
Crew[]
- Produced by Gerry Anderson, Fred Freiberger and F. Sherwin Green
- Music by Derek Wadsworth
- Cinematography by Frank Watts
- Film Editing by Alan Killick
- Casting By Lesley De Pettit (as Lesley de Pettitt)
- Production Design by Keith Wilson
- Costume Design by Emma Porteous
Makeup Department[]
- Jan Dorman: Hairdresser
- Jeanette Freeman (as Jeannette Freeman): Hairdresser
- Basil Newall: Makeup artist
- Connie Reeve: Makeup artist
Second Unit[]
- Robert Lynn: ssistant director
- David Lane: Second unit director (uncredited)
Art Department[]
- Michael Ford: Assistant art director
- Bill Waldron: Construction manager
Sound Department[]
- Roy Baker: Sound supervisor
- Jack T. Knight: Sound editor
- Brian Marshall: Sound recordist
- Peter Pennell: Sound editor
Special Effects[]
- Nick Allder: Lighting cameraman
- Michael S.E. Downing: Electronics
- Brian Johnson: Special effects designer / special effects director
- David Litchfield: Camera operator
- Andrew Kelly: Model maker (uncredited)
- Martin Bower: Model maker (uncredited)
Camera and Electrical Department[]
- Neil Binney: Camera operator
- John May: Gaffer (uncredited)
Additional Crew[]
- Alan Willis: Music editor
- Eileen Sullivan: Wardrobe
- Donald Toms: Production manager
- Doreen Soan: Continuity
- Reg Hill: Production executive
- David Lane: Technical director