Frank Kreig
Fiddler Hawkins (uncredited)
Paul Birch
Alonzo Hogue (uncredited)
Paul Frees
Second Radio Reporter / Opening Announcer
Peter Adams
Pine Summit Fire Watcher (uncredited)
Hugh Allen
Brigadier General (uncredited)
Edgar Barrier
Prof. McPherson (uncredited)
Russ Bender
Dr. Carmichael (uncredited)
Oscar Blank
Man in Church (uncredited)
Hazel Boyne
Screaming Woman (uncredited)
Chet Brandenburg
Man in Church (uncredited)
Nora Bush
Woman in Church (uncredited)
Tony Butala
Boy in Final Church (uncredited)
Mushy Callahan
Burning Soldier at Pit (uncredited)
Edward Colmans
Spanish Priest (uncredited)
James Conaty
Man at Pacific Institute of Science and Technology (uncredited)
Russ Conway
Rev. Bethany (uncredited)
Martin Coulter
Marine Sergeant (uncredited)
Vittorio Cramer
First Radio Reporter (uncredited)
Jane Crowley
Woman in Church (uncredited)
Jim Davies
Marine Commanding Officer (uncredited)
Helen Dickson
Woman in Church (uncredited)
Ralph Dumke
Buck Monahan (uncredited)
Jimmie Dundee
Civil Defense Official (uncredited)
Al Ferguson
Police Chief (uncredited)
Dick Fortune
Marine Captain (uncredited)
Frank Freeman Jr.
Bum #2 Listening to Radio (uncredited)
Slim Gaut
Radio Listener (uncredited)
Ned Glass
Well-Dressed Looter (uncredited)
Jack Gordon
Man in Church (uncredited)
Herman Hack
Worker Listening to Radio (uncredited)
Ted Hecht
KGEB Reporter (uncredited)
Douglas Henderson
Staff Sergeant (uncredited)
Gertrude Hoffmann
Elderly News Vendor (uncredited)
Tex Holden
Man in Church (uncredited)
Michael Jeffers
Worker Listening to Radio (uncredited)
Dick Johnstone
Man in Church (uncredited)
Carolyn Jones
Blonde Party Guest (uncredited)
Ivan Lebedeff
Dr. Gratzman (uncredited)
Freeman Lusk
Secretary of Defense (uncredited)
Herbert Lytton
Chief of Staff (uncredited)
Joel Marston
Military Policeman in Jeep (uncredited)
Sydney Mason
Fire Chief, Crew #3 (uncredited)
Mathew McCue
Man in Church (uncredited)
David McMahon
Minister, First Church (uncredited)
William Meader
P.E. Official (uncredited)
Ralph Montgomery
Los Angeles Red Cross Official (uncredited)
Bob Morgan
Injured Civil Defense Worker (uncredited)
Charles Morton
Worker Listening to Radio (uncredited)
George Nardelli
Military Officer (uncredited)
Stanley Orr
Marine Major (uncredited)
George Pal
Bum #1 Listening to Radio (uncredited)
Robert Rockwell
Forest Ranger at Crash Site (uncredited)
Walter Sande
Sheriff Bogany (uncredited)
James Seay
Air Force Bomber Pilot (uncredited)
Allen D. Sewall
Man in Church (uncredited)
Lucile Sewall
Woman in Church (uncredited)
Teru Shimada
Japanese Diplomat (uncredited)
Reginald Lal Singh
Military Officer (uncredited)
Bobby Somers
Deputy at Crash Site (uncredited)
Bert Stevens
Man in Church (uncredited)
Charles Stewart
Marine Captain (uncredited)
Dorothy Vernon
Elderly Woman at Square Dance (uncredited)
Anthony Warde
Military Police Driver (uncredited)
Bob Whitney
Military Officer (uncredited)
Chalky Williams
Worker Listening to Radio (uncredited)
Bud Wolfe
Rescuing Civil Defense Worker (uncredited)
Fred Zendar
Marine Lieutenant (uncredited)