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