Synopsis
After two gang-related killings in "Center City," a suspect (who was framed) is arrested, released on bail...and murdered. Inspector Briggs of the FBI recruits a young agent, Gene Cordell, to go undercover in the shadowy Skid Row area (alias George Manly) as a potential victim of the same racket. Soon, Gene meets Alec Stiles, neurotic mastermind who's "building an organization along scientific lines." Stiles recruits Cordell, whose job becomes a lot more dangerous.
Cast

Mark Stevens
Gene Cordell / George Manly

Richard Widmark
Alec Stiles

Lloyd Nolan
Inspector George A. Briggs

Barbara Lawrence
Judy Stiles

Ed Begley
Chief Bernard Harmatz

Donald Buka
Shivvy

Joseph Pevney
Matty

John McIntire
Cy Gordon

Walter Greaza
Lt. Paul Staller

Howard Smith
Ralph Demory
Larry Anzalone
Sparring Partner (Uncredited)

George Barrows
Bouncer at Gym (Uncredited)
Joan Blair
Valentine Laval (Uncredited)
James J. Casino
Cornerman (Uncredited)

Lane Chandler
Policeman at Arcade (Uncredited)
Dick Cherney
Man at Gym (Uncredited)

Noble 'Kid' Chissell
Prisoner (Uncredited)

Edmund Cobb
Desk Sergeant (Uncredited)
Vincent Donahue
Cholly (Uncredited)

Sam Edwards
Whitey (Uncredited)
Fred Fisher
Citizen (Uncredited)

Bruce Gordon
Detective in Raid (Uncredited)

Fred Graham
Bank Clerk (Uncredited)
Joe Gray
Boxer (Uncredited)
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