Nick Adams

John Dillinger

Robert Conrad

'Pretty Boy' Floyd

John Ashley

'Baby Face' Nelson

Mary Ann Mobley

Elaine

Victor Buono

Prof. Hofman

John Hoyt

Dr. Wilson

Anthony Caruso

Rocco

Reed Hadley

Federal Agent Parker

Art Baker

Warden

Emile Meyer

Det. Jergins

Robert Osterloh

Federal Agent Baum

Gene Roth

Herman, Justice of the Peace

Frank Gerstle

Watchman

Walter Sande

Judge

Joy Harmon

Nelson's Girl

Beverly Powers

Floyd's Girl (as Beverly Hills)

Ted Knight

Johnsyn