- Richard Anderson - Jeff Chapman
- Arthur Shields - Mr. O'Hara
- Louise Lorimer - Mrs. Peg O'Hara
- Henry O'Neill - Judge Keating
- Ann Doran - Betty Clark, Policewoman
- Emile Meyer - Captain Tom Mulvaney
- Regis Toomey - Fred Colton, Police Sound Man
- Katherine Warren - Mrs. William Sheffield (as Katharine Warren)
- John Albright - Waiter (uncredited)
- Tony Barr - Little Wolfie (uncredited)
- Richard Bartlett - Tony Korvac (uncredited)
- Brooks Benedict - Gambler (uncredited)
- Leonard Bremen - Harry (uncredited)
- Charles Bronson - Angelo Korvac (uncredited)
- Mae Clarke - Receptionist (uncredited)
- Michael Tolan - Vincent Korvac (as Lawrence Tolan) (uncredited)
- Peter Mamakos - James Korvac (uncredited)
- Sailor Vincent - William Sheffield (uncredited)
- Ned Glass - Preliminary Hearing Judge (uncredited)
- Bill Fletcher - Pete Korvac (uncredited)
- Jack Kruschen - Uniformed Detective (uncredited)
- William Schallert - Intern with Ambulance (uncredited)
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José Jara
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