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.
Mark Stevens
Richard Widmark
Lloyd Nolan
Barbara Lawrence
Ed Begley
Donald Buka
Joseph Pevney
John McIntire
Walter Greaza
Howard Smith
Larry Anzalone
George Barrows
Joan Blair
James J. Casino
Lane Chandler
Dick Cherney
Noble 'Kid' Chissell
Edmund Cobb
Vincent Donahue
Sam Edwards
Fred Fisher
Bruce Gordon
Fred Graham
Joe Gray
Kit Guard
Joe Haworth
Don Jessee
Robert Karnes
Johnny Kern
Mike Killian
Don Kohler
Lyle Latell
George Leonard
Jack Lomas
Marion Marshall
Billy Mauch
Roger McGee
Kitty McHugh
Joe McTurk
Lew Morphy
Robert Patten
Phillip Pine
Wally Rose
Wallace Scott
Sammy Shack
Dan Sheridan
Mickey Simpson
Randy Stuart
Brick Sullivan
Charles Tannen
Al Thompson
Philip Van Zandt
Kid Wagner
Billy Wayne
Robert B. Williams
Buddy Wright