- Timothy Bottoms
- Joe Bonham
- Kathy Fields
- Kareen
- Marsha Hunt
- Joe's Mother
- Jason Robards
- Joe's Father
- Donald Sutherland
- Christ
- Charles McGraw
- Mike Burkeman
- Sandy Brown Wyeth
- Lucky
- Don 'Red' Barry
- Jody Simmons
- Peter Brocco
- Ancient Prelate
- Kendell Clarke
- Hospital Offical
- Eric Christmas
- Corporal Timlon
- Eduard Franz
- Col. / Gen. Tillery
- Craig Bovia
- Little Guy
- Judy Howard Chaikin
- Bakery Girl
- Dalton Trumbo
- Orator
- Maurice Dallimore
- British Colonel
- Robert Easton
- Third Doctor
- Larry Fleischman
- Russ
- Anthony Geary
- Redhead
- Ed Gilbert
- Priest
- Ben Hammer
- Second Doctor
- Milton Barnes
- First Reader
- Wayne Heffley
- Captain
- Lynn Hanratty
- Elisabeth Age 6
- Ernestine Johnston
- Farm Woman
- Joseph Kaufmann
- Rudy
- Mike Lee
- Bill Harper
- Kerry MacLane
- Joe Age 10
- William Mims
- Gentleman
- Byron Morrow
- Brigadier General
- Alice Nunn
- Third Nurse
- Marge Redmond
- First Nurse
- Jodean Lawrence
- Second Nurse
- Diane Varsi
- Fourth Nurse
- David Soul
- Swede
- Peter Virgo Jr.
- Attendant
- Gigi Vorgan
- Catherine Age 13
- Jeffrey Walker
- Fifth Guy
- Bruce Watson
- Technician
- Winston Churchill
- Self - Opening Credits
- Xus Estruch
- (uncredited)
- Ken Globus
- Waiter
- Bob Harks
- Patient
- Monty O'Grady
- Churchgoer
- Margaret Pellegrini
- (uncredited)
- Philippe Pétain
- Self - Opening Credits
- Pepe Serna
- Jose
- Arthur Tovey
- Churchgoer
- Tom Tryon
- (uncredited)
- Tsar Nicholas II
- Self - Opening Credits
- Tsarina Alexandra
- Self - Opening Credits
- Etienne Veazie
- Black Youth
- Cynthia Wilson
- Catherine Age 7
- Woodrow Wilson
- Self - Opening Credits
- Jerry Zinneman
- Dead Bavarian
