Lt. JG H. Paynter Jr.
Bob Hale
Dr. Stuart Kelston
Fred Vollmer
Gen. Fuller
Eddie Miller
Father Stephen Hochen
Jess Torno
Tommy Nelson
Donald Blake
Lt. Green
Dr. Jim Barker
Paul Radin
Richard "Reef" Holloway
Dan Corbett
Dick Leonard
Edmond Clybourn
Cpl. Robert C. Dunne / Narrator
Man at Party
Lt. Cmdr. Don Landon (XO, USS Starfish)
Dr. Jim Crowley
Prof. Donald Blake in 'Monster on the Campus'
Bud Dolliver
George Ware
Lt. Arnie Carlson
Chaplain Harvey, segment "The Face"
Dave Hollister
Dick Anthony
Lt. Arthur Mitchell
Lt. Pete Stacey
Thad Wilkins
Carter
Henry Greene
Scott
Lt. 'Mace' Willard
Frederick Miller
Capt. Mike Barnes
Maj. Gen. Luke Howard
Army Psychiatrist
Harry Harris
Jarvis Addams
Danny Rhinegold
Morrissey
Dr. Raymond Eckworth
Dr. Bogart
Thad Avery
Narrator
Capt. Towers
John
Phil Young
David
Prosecutor (uncredited)
Macken
Self
Barnes
Ed Rilke
John Caldwell
Del Enright
Dr. Franzen
Father Vale
Dr. Sam Berger
Red
Danny Harrison
Everett Harper
First Minister Andre Picard
Henry Ford
Police Chief Moresdale
Sheriff Art Harris
Bus Driver
Carl Nelson
Fitz Warren
Steve Jordan
Dick Crosby
Kevin Stacy
James Madison
Norman
John Garth
Det. Sgt. Sol Moss
Dr. William Gorgas
Lee Brand
Nat Parker
Joseph Daly
Carl Stokely
Stacy Merriman
Neil
Frank Harrigan
Casimir Pulaski
Larry Fleming
Chris Grine
Sgt. Douglas Renfrew
Dr. Wayne Carlton
Sen. Jones
Richard
Dr. Craig's Son
Simon Dow
Richard Vanaman
Mayor James M. Henderson
Evans
Ray Ogilvie
Hack Wiles
Dr. Joyce
Walt
Franco
Laird Holden
Morgan Walding
Sims
Dr. Adler
William Jeffers Sr.
Caroll Shaw
Archer
Arthur Westphal
Sheriff Mike Miller
Harry Lytton
Asa Moran
Herb Caldwell
Charles Fredericks / C. F. Roper
Dr. Alex Conley
Lieutenant Rudy
Paul Hoyt
Dan Highet
Nathan Forge
Howard Boulder
Ben Macready
David Chandler
Joe Newbury
Professor Standish
Chris Mather
Capt. Jim Trent