- Martin Landau
- Commander John Koenig
- Barbara Bain
- Dr. Helena Russell
- Barry Morse
- Professor Victor Bergman
- Roy Dotrice
- Commissioner Gerald Simmonds
- Anthony Valentine
- Male Alien
- Isla Blair
- Female Alien
- Prentis Hancock
- Paul Morrow
- Zienia Merton
- Sandra Benes
- Anton Phillips
- Dr. Bob Mathias
- Nick Tate
- Alan Carter
- Philip Madoc
- Commander Anton Gorski
- Lon Satton
- Benjamin Ouma
- Eric Carte
- Eddie Collins
- Clifton Jones
- David Kano
- Patrick Allen
- Lunar Commission Chairman
- Weston Gavin
- Lunar Commission Deputy Chairman
- Marc Smith
- Commander Nardin / Narrator (archive footage)
- Tony Allyn
- Security Guard Tony Allan
- Robert Atiko
- Alphan
- Binu Balani
- Main Mission Operative
- Sarah Bullen
- Main Mission Operative Kate Bullen
- Loftus Burton
- Lee Oswald - Main Mission Operative
- Andy Dempsey
- Main Mission Operative
- Roy Everson
- Security Guard
- James Fagan
- Pete Johnson
- Don Fellows
- GTV Newscaster
- Alan Harris
- Alphan
- Raymond Harris
- Main Mission Operative
- Les Johnson
- Alphan
- Alf Joint
- Steiner
- Barbara Kelly
- Computer
- Chai Lee
- Anna Wong - Main Mission Operative
- Christopher Matthews
- Main Mission Operative
- Charles Napier
- Shuttle Captain
- Quentin Pierre
- Security Guard
- Jan Rennison
- Main Mission Operative
- Shane Rimmer
- Eagle Pilot
- Suzanne Roquette
- Tanya Alexandria
- Roy Scammell
- Jim Nordstrom
- Valerie Van Ost
- Main Mission Operative
- Norma West
- Main Mission Operative
- Paul Weston
- Main Mission Operative
