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Florence Marly as Alien Queen |
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Basil Rathbone as Dr. Farraday |
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John Saxon as Allan Brenner |
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Judi Meredith as Laura James |
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Dennis Hopper as Paul Grant |
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Robert Boon as Anders Brockman |
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Don Eitner as Tony Barrata |
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Virgil Frye as Control Panel |
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Forrest J. Ackerman as Farraday's Aide |
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Gary Crutcher as Spaceship Crew Member |
| Writing | Curtis Harrington | Writer |
| Production | Roger Corman | Executive Producer |
| Production | George Edwards | Producer |
| Directing | Curtis Harrington | Director |
| Production | Stephanie Rothman | Producer |
| Sound | Ronald Stein | Music Editor |
| Production | Samuel Z. Arkoff | Producer |
| Art | Al Locatelli | Art Direction |
| Editing | Leo H. Shreve | Editor |
| Camera | Vilis Lapenieks | Director of Photography |
| Art | Leon Smith | Set Decoration |
| Costume & Make-Up | George Spier | Hairstylist |
| Sound | James Nelson | Sound Effects |
| Costume & Make-Up | William Condos | Makeup Artist |
| Sound | Harold Garver | Sound |
| Sound | Gene Corso | Sound Effects |
| Sound | Ronald Stein | Music |
