| Person | Type | Job | Role(s) |
|---|---|---|---|
 David Raksin | Crew | Sound | Original Music Composer |
Leonard J. Ackerman | Crew | Production | Producer |
 Lucien Ballard | Crew | Camera | Director of Photography |
Malvin Wald | Crew | Writing | Writer |
Richard Wilson | Crew | Directing | Director |
Walter Hannemann | Crew | Editing | Editor |
John H. Burrows | Crew | Production | Producer |
Henry F. Greenberg | Crew | Writing | Writer |
Lloyd Garnell | Crew | Lighting | Gaffer |
 Al Ruscio | Cast | Actor | Tony Genaro |
 Allen Jaffe | Cast | Actor | Bodyguard |
 Charles Sherlock | Cast | Actor | Reporter (uncredited) |
 Clegg Hoyt | Cast | Actor | Lefty |
 Dan Riss | Cast | Actor | Voice of Radio Announcer (uncredited) |
 Fay Spain | Cast | Actress | Maureen Flannery |
 Forbes Murray | Cast | Actor | Pallbearer at Colosimo's Funeral (uncredited) |
 Fred Aldrich | Cast | Actor | Funeral Spectator |
 Fred Sherman | Cast | Actor | Storekeeper (uncredited) |
 James Bacon | Cast | Actor | Reporter |
 James Gregory | Cast | Actor | Schaefler (narrator) |
 Joe De Santis | Cast | Actor | Big Jim Colosimo |
 Larry Chance | Cast | Actor | Vincent (uncredited) |
 Lewis Charles | Cast | Actor | Earl Weiss |
 Martin Balsam | Cast | Actor | Mac Keeley, reporter |
 Mauritz Hugo | Cast | Actor | Hood (uncredited) |
 Murvyn Vye | Cast | Actor | George 'Bugs' Moran |
 Nehemiah Persoff | Cast | Actor | Johnny Torrio |
 Paul Bryar | Cast | Actor | Police Inspector (uncredited) |
 Ralph Brooks | Cast | Actor | Convict in Yard at Alcatraz |
 Raymond Bailey | Cast | Actor | Lawyer Brancato |
 Robert Gist | Cast | Actor | Dion O'Banion |
 Rod Steiger | Cast | Actor | Al Capone |
 Ron Soble | Cast | Actor | John Scalisi |
Rudy Doucette | Cast | Actor | Hood (uncredited) |
Russell Custer | Cast | Actor | Funeral Spectator (uncredited) |
 Sol Gorss | Cast | Actor | Capone Hood at Polling Place (uncredited) |
Steve Gravers | Cast | Actor | Albert Anselmi |
Dick Cherney | Cast | Actor | Moran Associate (uncredited) |
 Sandy Kenyon | Cast | Actor | Bones Corelli |
 Louis Quinn | Cast | Actor | Joe Lorenzo |
Mason Curry | Cast | Actor | Tailor (uncredited) |
 Paul Bradley | Cast | Actor | Benefit Guest |
Raikin Ben-Ari | Cast | Ben Hoffman | |
Cindy Ames | Cast | Nurse | |
| Person | Type | Job | Role(s) |
