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Hugh Beaumont as Dennis O'Brien |
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Edward Brophy as 'Professor' Fredrick Simpson Schicka |
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Richard Travis as Inspector Bruger |
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Joan Valerie as Irma Rand |
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Wanda McKay as Sylvia Rand |
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Rebel Randall as Gail Chase |
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William Tannen as Ed Gannon |
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Greg McClure as Steve Belzig alias Vic Lundy |
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Anthony Warde as Bill Rafferty |
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Abner Biberman as Eddie Paige |
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Stanley Price as Harry Barton |
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A.J. Roth as Sparring Partner |
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Paul Brooks as Tom Fallon, alias Steve Rand |
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Richard Monahan as Henry - the Bartender |
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Bing Conley as Bookie (uncredited) |
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Charles Fogel as Boxing Match Spectator (uncredited) |
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Joe Gilbert as Waiter (uncredited) |
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Robert Lawson as Nightclub Patron (uncredited) |
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Rex Moore as Bookie (uncredited) |
| Writing | Julian Harmon | Screenplay |
| Directing | William Berke | Director |
| Writing | Lou Morheim | Original Story |
| Costume & Make-Up | Paul Stanhope | Makeup Artist |
| Camera | Jack Greenhalgh | Director of Photography |
| Editing | Carl Pierson | Editor |
| Production | William Berke | Producer |
| Art | Frank Paul Sylos | Art Direction |
| Art | Leigh Carson | Property Master |
| Art | Tom Kemp | Construction Foreman |
| Costume & Make-Up | Alfred Berke | Wardrobe Supervisor |
| Sound | Glen Glenn | Sound |
| Writing | Herb Margolis | Original Story |
| Production | Jack Leewood | Associate Producer |
| Sound | Bert Shefter | Music |
| Art | Harry Reif | Set Decoration |
| Crew | Ray Mercer | Special Effects |
| Editing | Harry Reynolds | Editor |
| Crew | Stanley Price | Dialogue Coach |
| Directing | John Francis Murphy | Assistant Director |
| Writing | Victor West | Screenplay |
