George Nader
Glenn Martin
Barbara Nichols
Gale Wilson
George Macready
Prof. Vaughn Dornheimer
Dolores Faith
Lisa Dornheimer
Hugh Beaumont
Austin Welles
Richard Arlen
National Intelligence
Richard Kiel
Dr. Kolos
John Indrisano
Thor, the Butler
Ted Durant
The Galaxy Being
Tommy Leonetti
Reporter (uncredited)
Margaret Teele
Blonde Lab Assistant
Alean 'Bambi' Hamilton
Brunette Lab Assistant
Walter Abel
Dr. Munson
Mel Ruick
Dr. Munson (as Melville Ruick)
Kim Satana
Dr. Lin Yung
John Dasten
(as John Daston)
William White
(as Bill Hampton)
Lon Satton
Reporter (uncredited)
Andrew Johnson
(Uncredited)
