- Tony Curtis
- Ferdinand Waldo Demara Jr. / Martin Donner / Dr. Gilbert / Ben. W. Stone / Dr. Joseph Mornay / Robert Boyd Hammnd
- Karl Malden
- Father Devlin
- Edmond O'Brien
- Capt. Glover - HMCS Cayuga
- Arthur O'Connell
- Warden J.B. Chandler
- Gary Merrill
- Pa Demara
- Joan Blackman
- Lt. Catherine Lacey
- Raymond Massey
- Abbott Donner
- Robert Middleton
- R.C. Brown
- Jeanette Nolan
- Ma Demara
- Sue Ane Langdon
- Eulalie Chandler
- Larry Gates
- Cardinal
- Mike Kellin
- Clifford Thompson
- Frank Gorshin
- Barney
- Cindi Wood
- WAC Lieutenant
- Dick Sargent
- Hotchkiss
- Robert Crawford Jr.
- Fred Demara Jr.
- Doodles Weaver
- Farmer Hauling Fertilizer
- Ward Ramsey
- Lieutenant Commander Howard - HMCS Cayuga
- David White
- Dr. Hammond
- Philip Ahn
- Capt. Hun Kim
- Herbert Rudley
- Senior Officer
- Jerry Paris
- Defense Lieutenant
- Harry Carey Jr.
- Dr. Joseph Mornay
- Willard Sage
- Lt. Thornton
- Robert Anderson
- Guard
- Robert Barrow
- Minor Role
- Nicky Blair
- Sergeant
- Helen Boll
- WAC Corporal
- John Breen
- Monk
- Maggie Brooks
- Nurse
- George Bruggeman
- Guard
- George Calliga
- Monk
- Charles Cane
- Sheriff
- Charles Cantor
- Dr. Kozumplik
- Jane Chang
- Korean Woman
- Gage Clarke
- Mr. Warren
- John Cliff
- Marine Major
- Russ Conway
- Sgt. Wilkerson
- Wilson Cornell
- Minor Role
- Jack Deery
- Monk
- Lincoln Demyan
- Military Policeman
- Joanna Dix
- Elsie
- James Dobson
- Sailor
- Roger Dollarhide
- Wireless Operator
- Robert Dornan
- Reporter
- James Drake
- Seaman
- Scott Elliott
- Reporter
- Michael Emmet
- Minor Role
- Elizabeth Flournoy
- Sister Veronica
- Michael Ford
- Soldier
- Richard Gaines
- State Official
- Richard George
- Monk in Monastery
- Tim Graham
- Cabbie
- Joe Gray
- Federal Prison Inmate
- Harry Harvey Jr.
- Seaman
- Bob Hastings
- State Department Official
- Bob Herron
- Highway Patrol Officer
- Wendell Holmes
- Surgeon Commander Winston
- Shep Houghton
- Board Member
- William Hudson
- FBI Man
- Dale Ishimoto
- Korean Soldier
- Bob January
- Soldier
- Kenner G. Kemp
- Monk
- Robert Kino
- Korean Officer
- Ted Knight
- Reporter
- George Lake
- Minor Role
- Hugh Lawrence
- Escoring Officer
- Karl Lukas
- Prisoner
- Herbert Lytton
- Reporter
- Ted Markland
- Seaman
- Douglas Marland
- Messenger
- Alphonse Martell
- French Waiter
- Frank Maxwell
- Tirdell
- Tipp McClure
- Soldier
- John McComb
- Seaman
- Oliver McGowan
- RCN Commander
- Bill McLean
- Seaman
- David McMahon
- Federal Prison Guard
- John W. Morley
- Board Officer
- Colleen O'Sullivan
- Secretary
- Charles Perry
- Monk
- Anthony Redondo
- Board Member
- Tony Regan
- Board Member
- Nancy Root
- Miss Kane
- Don Ross
- Sergeant
- John Roy
- Prisoner
- Bing Russell
- Morgan
- Frank Sentry
- Soldier
- Dan Sheridan
- RCN Chief
- John Slosser
- St. Augustine School Classmate
- Paul Sorensen
- Guard
- Tom Steele
- Highway Patrol Officer
- Norman Stevans
- Board Member
- Roy Taguchi
- Korean Patient
- George Taylor
- Reporter
- Harry Townes
- Ben Stone
- Warren Vanders
- Minor Role
- Jarl Victor
- Guard
- Don Wilbanks
- FBI Man
- Barbara Wooddell
- Head Nurse
- John Zaremba
- Cardinal's aide
