Rod Steiger

Al Capone

Fay Spain

Maureen Flannery

James Gregory

Schaefler (narrator)

Martin Balsam

Mac Keeley, reporter

Nehemiah Persoff

Johnny Torrio

Murvyn Vye

George 'Bugs' Moran

Robert Gist

Dion O'Banion

Lewis Charles

Earl Weiss

Joe De Santis

Big Jim Colosimo