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Hugh Beaumont as Dennis O'Brien |
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Ann Savage as Ann Harmon |
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Edward Brophy as Prof. Shicker |
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Richard Travis as Police Inspector Lt. Bruger |
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Margia Dean as Flo Klingle |
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Mike Mazurki as Ape Danowski |
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David Bruce as Charles Giffen |
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Raymond Greenleaf as Father Donovan |
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Eve Miller as Norma Harmon |
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Harry Hayden as Dr. Earl J. Tomkins |
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Joi Lansing as The Cocktail Waitress |
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Peter Mamakos as Nick Garrison |
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Chris Drake as Mike Greeley |
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Billy Varga as Willie Klingle |
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John Indrisano as Mushy Cavelli |
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Richard Monahan as Henry - Bartender |
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Charles Wagenheim as Lefty - Policy Man |
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Jack Chefe as Waiter (uncredited) |
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Heinie Conklin as Counter Man (uncredited) |
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Jack Gordon as Wrestling Match Spectator (uncredited) |
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Kit Guard as Drunk at Wrestling Match (uncredited) |
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Barry Norton as Waiter (uncredited) |
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Cosmo Sardo as Club patron (uncredited) |
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Max Wagner as Bar Patron (uncredited) |
| Directing | William Berke | Director |
| Writing | Julian Harmon | Screenplay |
| Writing | Lou Morheim | Story |
| Writing | Herb Margolis | Story |
| Writing | Victor West | Screenplay |
| Sound | Bert Shefter | Music |
| Costume & Make-Up | Alfred Berke | Wardrobe Supervisor |
| Art | Leigh Carson | Property Master |
| Crew | Ray Mercer | Special Effects |
| Directing | John Francis Murphy | Assistant Director |
| Art | Tom Kemp | Construction Manager |
| Crew | Stanley Price | Dialogue Coach |
| Art | Harry Reif | Set Decoration |
| Editing | Carl Pierson | Editor |
| Production | William Berke | Producer |
| Editing | Harry Reynolds | Editor |
| Production | Jack Leewood | Associate Producer |
| Sound | Glen Glenn | Sound |
| Camera | Jack Greenhalgh | Director of Photography |
| Art | Frank Paul Sylos | Art Direction |
| Costume & Make-Up | Paul Stanhope | Makeup Artist |
