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Boris Karloff as Dr. Konrad Markesan |
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Dick York as Fred Bancroft |
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Carolyn Kearney as Molly Bancroft |
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Richard Hale as Prof. Everett Latimore |
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Henry Hunter as Prof. Angus Holden |
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Basil Howes as Prof. Charing |
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Billy Beck as Prof. Grant |
| Camera | Benjamin H. Kline | Director of Photography |
| Writing | Donald S. Sanford | Adaptation |
| Writing | August Derleth | Story |
| Production | Douglas Benton | Associate Producer |
| Directing | Robert Florey | Director |
| Sound | Morton Stevens | Music |
| Costume & Make-Up | Jack Barron | Makeup Artist |
| Editing | Danford B. Greene | Editor |
| Production | William Frye | Producer |
| Art | Howard E. Johnson | Art Direction |
| Costume & Make-Up | Florence Bush | Hair Designer |
| Directing | John Clarke Bowman | Assistant Director |
| Writing | Mark Schorer | Story |
| Art | Julia Heron | Set Decoration |
| Art | John McCarthy Jr. | Set Decoration |
| Art | Jerome Gould | Graphic Designer |
| Costume & Make-Up | Vincent Dee | Costume Supervisor |
| Sound | Pete Rugolo | Music |
| Editing | David J. O'Connell | Editorial Manager |
| Sound | Corson Jowett | Sound |
| Sound | Stanley Wilson | Music Supervisor |
