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George Nader as Glenn Martin |
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Barbara Nichols as Gale Wilson |
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George Macready as Prof. Vaughn Dornheimer |
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Dolores Faith as Lisa Dornheimer |
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Hugh Beaumont as Austin Welles |
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Richard Arlen as National Intelligence |
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Richard Kiel as Dr. Kolos |
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John Indrisano as Thor, the Butler |
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Ted Durant as The Galaxy Being |
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Tommy Leonetti as Reporter (uncredited) |
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Walter Maslow as |
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Larry Barton as |
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Lori Lyons as |
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Benito Prezia as |
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Margaret Teele as Blonde Lab Assistant |
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Alean 'Bambi' Hamilton as Brunette Lab Assistant |
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Walter Abel as Dr. Munson |
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Lon Satton as |
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Mel Ruick as Dr. Munson (as Melville Ruick) |
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Kim Satana as Dr. Lin Yung |
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John Dasten as (as John Daston) |
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Richard Schuyler as |
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William White as (as Bill Hampton) |
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Lon Satton as Reporter (uncredited) |
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Andrew Johnson as (Uncredited) |
| Directing | Hugo Grimaldi | Director |
| Writing | Arthur C. Pierce | Writer |
| Production | Arthur C. Pierce | Producer |
| Production | Hugo Grimaldi | Producer |
| Production | Lawrence Woolner | Executive Producer |
| Camera | Monroe P. Askins | Director of Photography |
| Editing | Donald Wolfe | Editor |
| Art | Paul Sylos | Art Direction |
| Art | Raymond Boltz Jr. | Set Decoration |
| Costume & Make-Up | Mickey Meyers | Costume Design |
| Costume & Make-Up | Bob Mark | Makeup Artist |
| Production | Jesse Corallo | Production Manager |
| Directing | Jesse Corallo | Assistant Director |
| Directing | Clancy Herne | Second Assistant Director |
| Art | Ross C. Burke | Property Master |
| Sound | Robert Reeve | Sound Effects Editor |
| Sound | Jean G. Valentino | Sound Mixer |
| Sound | Robert Glenn | Sound Editor |
| Camera | Frank Dugas | Camera Operator |
| Lighting | George Marquenie | Gaffer |
| Production | Marvin Paige | Casting Consultant |
| Crew | Roger George | Special Effects |
| Costume & Make-Up | Kay Shea | Hairstylist |
| Camera | John Livesley | Key Grip |
| Costume & Make-Up | John Chambers | Special Effects Makeup Artist |
| Sound | Gordon Zahler | Music Director |
| Sound | Igo Kantor | Music Editor |
| Sound | Walter Greene | Music |
| Sound | Hans J. Salter | Music |
| Sound | Leith Stevens | Music |
