James Stewart
Paul Biegler
Ben Gazzara
Lt. Frederick Manion
Arthur O'Connell
Parnell Emmett McCarthy
George C. Scott
Claude Dancer
Orson Bean
Dr. Matthew Smith
Murray Hamilton
Alphonse Paquette
Brooks West
Dist. Atty. Mitch Lodwick
Ken Lynch
Det. Sgt. James Durgo
John Qualen
Deputy Sheriff Sulo
Howard McNear
Dr. Dompierre
Alexander Campbell
Dr. W. Gregory Harcourt
Jimmy Conlin
Clarence Madigan
Royal Beal
Sheriff Battisfore
Don Ross
Duane 'Duke' Miller
Lloyd Le Vasseur
Court Clerk
James Waters
Army Sergeant 1st Class
Joseph N. Welch
Judge Weaver
Duke Ellington
Pie Eye (uncredited)
Irv Kupcinet
Distinguished Gentleman (uncredited)
Chuck Ramsay
Orderly (uncredited)
Agnes Rodgers Brown
Juror (uncredited)