Captain Frank Chapman
Dean Fredericks
Liara
Coleen Gray
Captain Beecher
John Herrin
Lt. Cutler
Mel Curtis
Lt. Webb
Jimmy Weldon
Communications Officer
Akemi Tani
Radar Officer
Lori Lyons
The Solarite
Richard Kiel
Juror
Susan Cembrowska
Marissa Mathes
Gloria Moreland
Judy Erickson
Herron
Anthony Dexter
Sally Carter-Ihnat
Allyson Ames
Marion Thompson
Introductory Narrator (voice)
Marvin Miller
Ipsalata
Warrene Ott
Angelique Pettyjohn
Zetha
Dolores Faith
Sessom
Francis X. Bushman
Lt. Ray Makonnen
Richard Weber
Judge Eden
Al Jarvis
Col. Lansfield
Dick Haynes
Capt. Leonard
Earl McDaniel
Lt. White
Mike Marshall
Director
William Marshall
Additional Dialogue
Makeup Artist
David Newell
Screenplay
William Telaak
Fred De Gorter
Executive Producer
Leo A. Handel
Production Design
Robert Kinoshita
Fred Gebhardt
Music Supervisor
Gordon Zahler
Music Editor
Ted Roberts
Associate Producer
Special Effects
Charles Duncan
Hairstylist
Mary Westmoreland
Visual Effects
Louis DeWitt
Producer
Original Story
Director of Photography
Elwood J. Nicholson