Whit Bissell

as Dr. Williamson

as Sen. John Conness

as Dr. Ted Horne

as Dr. Paul Taylor

as Gov. Santini

as Funeral Minister

as Jim Newhart

as Capt. Moss

as Prof. Holmes

as Dr. Cooper

as Bruce Donnelly

as Hobbs

as Professor Bell

as Capt. Queeg

as Sen. Frederick Prentice

as Mr. Burris

as Dr. Campbell

as Dr. Ellis

as Walter Kemp

as Capt. Alofson, Psychiatrist

as Petrix

as Harmon

as Pierce

as Dr. Oliver Cole

as Lou Gans

as Prof. Frankenstein

as Adam Judson

as Dr. Alfred Brandon

as Josiah Quincy

as 'Tombstone Epitaph' Editor John P. Clum

as Grubbs

as Breezy Morgan

as Mark Chester

as Mr. Sam Bolton

as Emergency Room Psychiatrist

as Clem Clark

as Dr. Pierce

as Eddie

as Sam Wiltse

as FBI Agent Carson

as Dist. Atty. Blaker

as Dr. Dietrich

as Dr. Edgar Pangborn

as Tom

as Deke

as Paul Grant

as Dr. Edwin Thompson

as Guard Snader

as Robert Grau

as Virgil Gates

as Buck (uncredited)

as Wilfred Jackson

as Pickpocket

as Joe Elsner

as Stanley Briggs

as Miles

as Schuster

as Sid Bennet

as Rental Agent (uncredited)

as Harold Simpson (chief teller)

as Lt. M.J. Hanley - Psychiatrist (uncredited)

as Capt. Winnow (uncredited)

as Paul Reeves

as Giulio

as Heilman

as Murderer

as Jugger

as Dr. Stauffer

as John (uncredited)

as Archie

as Harry Leek (uncredited)

as London Bobbie (uncredited)