James Simpson
Peter Keating
Oliver Reed
Jeffrey Stewart
Dr. Parry
Dr. Richard Talbot aka Robert Thompson
Warren Packer
Gen. Webster
Oliver 'Ollie' Reed
Dr. Thorne
Martin Blackford
District Attorney Tom Paine
Attorney (uncredited)
Paul Martin
David Cummins
Secretary of the Air Force
Robert Dodd
Dr. Pete Graham
Secretary of War
Raymond
Andrew Oxley
Dr. Fain
Harry Gordon
Danny Coates
Stanley Baxter
Bill Fergunson
Professor Nichols
Quanah Parker
Paul Winter Sr.
Woode Swift
Akamai Barnes
Frank Lucas
Capt. Reining - American Working for the Nazis
Francis Fairon
Kenneth Bartlett
Dr. Edward Laurent
Brig. Gen. Charles Lane
Dr. Shoemaker
Gus Iverson
John Rogers
Oliver Parmalee
John Hill
Hoopendecker
Uncle George Clancy
Mr. Patterson
Cyril Lounsberry
Lewis H. Wengler
Mr. Eversley
Gen. Enright
Paul Kimmel
Simon Isham
Gates Trimble Pomfret
Father Keating
General
Kaverley
Captain A. Edwards
Instructor Lieutenant
Briefing Colonel
Professor Fritz Bhaer
Narrator
Robert Vincent
Charles Dennis
Gen. Nelson Miles
US Attorney Leonard Vanatter
Clifton Cavanaugh
George Blake
Dr. Arthur Younger
Bealton
Friedrich Bhaer
Chief Justice Brown
Dr. Jonathan Michael
Senator William Townsend
Bolingbroke
Gilbert Hughes
General Hugh Scott
Bill Franklin
David Barlow
George
Howard Meston
Michael Legrange
Charles Evans Hughes
John Wilkes Booth
Prince Albert
Dwight Harkavy
Dr. Block
Dexter Willis
Doctor
Prof. Paul Owens
Crandall
Wendell Price
Commodore Coldwell
Elwood Hayes
Dakota
Avery Coombs
Aabel
Steve Ferris
Steven, at 48
Ainslee
William Carroll
Grymes
Mr. Benner
Dr. Curtis Metcalfe
Governor Winston E. Brubaker
Bennett
Keats
Mr. Macy
Stan Arthur
Kent Smith
Edgar Scoville
Gen. Jacklyn
Dr. Jonathan Michel, the Psychiatrist
Jerry O'Hara
Dr. Sam Adamson