• 
  Rod Steiger

  Al Capone
• 
  Joseph Sargent

  Bob Buell, Asst. District Attorney Dade County Florida
• 
  Charles Sherlock

  Reporter
• 
  James Gregory

  Schaefler (narrator)
• 
  Shep Houghton

  Poliţist
• 
  Ralph Brooks

  Convict in Yard at Alcatraz
• 
  Martin Balsam

  Mac Keeley, reporter
• 
  Murvyn Vye

  Bugs Moran

• 
  Sydney Lassick

  Hot Dog Vendor
• 
  Dan Riss

  Voice of Radio Announcer
• 
  Nehemiah Persoff

  Johnny Torrio
• 
  Fred Aldrich

  Spectator
• 
  Robert Gist

  Dion O'Banion
• 
  Stuart Holmes

  Courtroom Extra
• 
  Joe De Santis

  Big Jim Colosimo

• 
  Roy Jenson

  client
• 
  Harold Miller

  Pallbearer at Colosimo's Funeral
• 
  Mason Curry

  Tailor

• 
  Lucien Ballard

  imagine
• 
  David Raksin

  departament sunet
• 
  Walter Hannemann

  montaj
• 
  Joseph Sargent

  miscellaneous crew
• 
  David Raksin

  music department
• 
  Hilyard M. Brown

  design de producţie
• 
  Joseph Kish

  set decorator
• 
  Malvin Wald

  scriitor