Lt. Parmental
Dr. Mort Schneider
Col. Craig C. Hardcore
Flagler
Mr. Hardin
Ranken
Harry Samson (uncredited)
Nathan White
Mickey Malnato
Spicer
Charles Mackley
Frank Davis
Lt. Kellerman
Coslough
Si
Buzz Bronski (voice)
Gen. Taylor
Prof. Elliott Glastenbury
Surtees
Captain Prescott
Sergeant Fireman
Dr. Schneider (archive footage)
Johnson
Ralph Sloan
Kennedy
Wieser
McGee
Houston
David Burnett
Red Bennett
John Blackstone
Jennings
Head of Program
Joe Flynn
Sam Bones
Thomas Vandervere / Prosecutor
Henry Logan
The Devil
Mr. O'Rourke
Chuck
Patsy O'Neill
Vernon
Arthur
Detective Dave Lambert
Arms Dealer (Uncredited)
Hendrick Hudson
Oeuf
Major Van Zandt
Sheriff Bob Cavendish
Ernie Flood
Guido Marioni
Kurt Belzack
Peter Ibbotson
Lieutenant Barney Brighton
Carl Ainsley
William Quine
Hendrick Hudson / Narrator (voice)
Peter Doyle
Dearborn