They cracked the back of the world's blackest racket ! A cop ! A dame ! A killer !

A federal agent infiltrates a crime syndicate.

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Main Cast: Howard Duff, Shelley Winters, Dan Duryea, Tony Curtis, John McIntire, Gar Moore, Leif Erickson, Barry Kelley, Hugh Reilly, Wally Maher

Director: William Castle

Writers: Henry Jordan, Robert L. Richards

Editor: Ted J. Kent

Cinematographer: Maury Gertsman

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