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Leo Gorcey as Terence Aloysius 'Slip' Mahoney |
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Huntz Hall as Horace Debussy 'Sach' Jones |
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Bobby Jordan as Bobby |
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William Benedict as Whitey |
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David Gorcey as Chuck |
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Teala Loring as Cathy Smith |
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Sheldon Leonard as Ace Deuce Baker |
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Daun Kennedy as Maizie (as Dawn Kennedy) |
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James Burke as Detective O'Malley |
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Vince Barnett as Street Cleaner |
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William 'Wee Willie' Davis as Moose McCall (as Wee Willie Davis) |
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William Ruhl as Henchman Spike |
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Emmett Vogan as Mr. Johnson |
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Bernard Gorcey as Louie Dumbrowsky |
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Milton Parsons as Professor Schnackenberger |
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Lester Dorr as Feather-Fingers |
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William Newell as Detective Dugan |
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Eddie Dunn as Police Officer O'Hara |
| Directing | Phil Karlson | Director |
| Writing | Edmond Seward | Screenplay |
| Writing | Tim Ryan | Dialogue |
| Writing | Victor Hammond | Story |
| Production | Jan Grippo | Producer |
| Production | Lindsley Parsons | Producer |
| Camera | William A. Sickner | Director of Photography |
| Editing | William Austin | Editor |
| Art | Dave Milton | Art Direction |
| Costume & Make-Up | Harry Ross | Makeup Artist |
| Production | Glenn Cook | Production Manager |
| Directing | Theodore Joos | Assistant Director |
| Sound | Tom Lambert | Sound |
| Editing | Richard C. Currier | Supervising Editor |
| Sound | Edward J. Kay | Music Director |
