Directed by
| Lew Landers | ||
Writing Credits
| Hal Fimberg | ... | (story) and |
| Robert B. Hunt | ... | (story) |
| Edwin Blum | ... | (screenplay) |
| Paul Gangelin | ... | (adaptation) |
Cast (in credits order) verified as complete
| Boris Karloff | ... | Prof. Nathaniel Billings | |
| Peter Lorre | ... | Dr. Arthur Lorencz | |
| Maxie Rosenbloom | ... | Maxie - the Powder Puff Salesman | |
| Larry Parks | ... | Bill Layden | |
| Jeff Donnell | ... | Winnie Slade (as Miss Jeff Donnell) | |
| Rest of cast listed alphabetically: | |||
| Don Beddoe | ... | J. Gilbert Brampton (uncredited) | |
| Maude Eburne | ... | Amelia Jones (uncredited) | |
| Robert Emmett Keane | ... | Alarm Clock Salesman (uncredited) | |
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Eddie Laughton | ... | Mr. Johnson (uncredited) |
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George McKay | ... | Ebenezer (uncredited) |
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Patrick McVey | ... | Munitions Plant Road Guard (uncredited) |
| Frank Mitchell | ... | Fred - the Cop (uncredited) | |
| James C. Morton | ... | Trooper Fred Quincy (uncredited) | |
| Frank Puglia | ... | Silvio Baciagalupi - The Human Bomb (uncredited) | |
| Frank Sully | ... | Police Officer Joe Starrett (uncredited) | |
Produced by
| Colbert Clark | ... | producer |
Cinematography by
| Henry Freulich | ... | director of photography |
Editing by
| Richard Fantl | ||
Art Direction by
| Lionel Banks | ||
Set Decoration by
| George Montgomery | ... | interior decorator |
Makeup Department
| Clay Campbell | ... | makeup artist (uncredited) |
Second Unit Director or Assistant Director
| Seymour Friedman | ... | assistant director (uncredited) |
Art Department
| Robert Peterson | ... | associate art director |
Sound Department
| Charles Althouse | ... | sound (uncredited) |
| Jack A. Goodrich | ... | sound engineer (uncredited) |
Costume and Wardrobe Department
| Eugene Joseff | ... | costume jeweller (uncredited) |
Music Department
| Morris Stoloff | ... | musical director (as M.W. Stoloff) |
| Leigh Harline | ... | composer: stock music (uncredited) |
| John Leipold | ... | composer: title music (uncredited) |
| Paul Mertz | ... | composer: stock music (uncredited) |
| Jean Vincent Plummer | ... | musician: piano (uncredited) |
