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Leo Gorcey as Slip Mahoney |
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Huntz Hall as Sach |
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Gabriel Dell as Gabe Moreno |
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Alan Napier as Dr. Druzik |
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Jane Adams as Nancy Marlowe |
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William Benedict as Whitey |
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Bernard Gorcey as Louie |
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Glenn Strange as Atlas the Monster |
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Benny Bartlett as Butch |
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David Gorcey as Chuck |
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Skelton Knaggs as Hugo |
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William Yetter Sr. as Otto |
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Minerva Urecal as Mrs. Hoskins |
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Chester Clute as Mike Barton |
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Pat Goldin as Father |
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Robert Coogan as Young Man |
| Directing | Jean Yarbrough | Director |
| Writing | Charles R. Marion | Screenplay |
| Writing | Charles R. Marion | Story |
| Sound | Edward J. Kay | Music Director |
| Production | Jan Grippo | Producer |
| Camera | Marcel Le Picard | Director of Photography |
| Editing | William Austin | Editor |
| Art | Dave Milton | Art Direction |
| Art | Raymond Boltz Jr. | Set Decoration |
| Costume & Make-Up | Jack Pierce | Makeup Artist |
| Production | Allen K. Wood | Production Supervisor |
| Directing | William A. Calihan Jr. | Assistant Director |
| Sound | Tom Lambert | Sound |
| Sound | B.J. Remington | Sound |
| Editing | Otho Lovering | Supervising Film Editor |
| Directing | Ilona Vas | Script Supervisor |
| Camera | William Margulies | Camera Operator |
| Sound | Dean Spencer | Sound |
| Camera | Harry Lewis | Grip |
| Lighting | Lloyd Garnell | Gaffer |
