Robert Stack ( Robert Stack )

Eliot Ness

Keenan Wynn ( Keenan Wynn )

Joe Fuselli

Barbara Nichols ( Barbara Nichols )

Brandy LaFrance

Pat Crowley ( Pat Crowley )

Betty Anderson

Bill Williams ( Bill Williams )

Martin Flaherty

Joe Mantell ( Joe Mantell )

George Ritchie

Bruce Gordon ( Bruce Gordon )

Frank Nitti

Neville Brand ( Neville Brand )

Al Capone

Peter Leeds ( Peter Leeds )

Eddie Firestone ( Eddie Firestone )

Robert Osterloh ( Robert Osterloh )

Paul Dubov ( Paul Dubov )

Abel Fernandez ( Abel Fernandez )

Wolfe Barzell ( Wolfe Barzell )

Picco

John Beradino ( John Beradino )

Johnny Giannini