Synopsis
When an employee at an illegal gambling den dies suspiciously, her sister, Nancy, looks into the situation and falls for Johnny O'Clock, a suave partner in the underground casino. Selfish and non-committal by nature, Johnny slowly begins to return Nancy's affection and decides to run away with her, but conflict within his business threatens their plans. As Johnny tries to distance himself from the casino, his shady past comes back to haunt him.
Cast

Dick Powell
Johnny O'Clock

Evelyn Keyes
Nancy Hobson

Lee J. Cobb
Inspector Koch

Ellen Drew
Nelle Marchettis

Nina Foch
Harriet Hobson

Thomas Gomez
Pete Marchettis

John Kellogg
Charlie

Jim Bannon
Chuck Blayden

Mabel Paige
Slatternly Woman Tenant

Phil Brown
Phil, Hotel Clerk

Fred Aldrich
Hotel Doorman
George Alesko
Practical Dealer
John P. Barrett
Floorman
Fred Beecher
Practical Dealer

Brooks Benedict
Card Player

John Berkes
Waiter

Jeff Chandler
Turk
Gene Delmont
Dealer

Johnny Duncan
Newsboy

Matty Fain
Fleming

Virginia Farmer
Mrs. Wilson

Victoria Faust
Marion

Adolph Faylauer
Hotel Guest
Jerry Frank
Man
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