Gene Barry
Clayton Forrester
Ann Robinson
Sylvia Van Buren
Lewis Martin
Matthew Collins
Les Tremayne
General Mann
Frank Kreig
Fiddler Hawkins (uncredited)
Vernon Rich
Ralph Heffner
Sandro Giglio
Dr. Bilderbeck
Ann Codee
Dr. Duprey (uncredited)
Robert Cornthwaite
Dr. Pryor
Cedric Hardwicke
Commentary (voice)
![Houseley Stevenson Jr.]()
Houseley Stevenson Jr.
General Mann's Aide
William Phipps
Wash Perry
Jack Kruschen
Salvatore
Paul Birch
Alonzo Hogue (uncredited)
Paul Frees
Second Radio Reporter / Opening Announcer
Henry Brandon
Cop at Crash Site
Peter Adams
Pine Summit Fire Watcher (uncredited)
Eric Alden
Man (uncredited)
![Hugh Allen]()
Hugh Allen
Brigadier General (uncredited)
![Ruth Barnell]()
Ruth Barnell
Mother (uncredited)
Edgar Barrier
Prof. McPherson (uncredited)
Russ Bender
Dr. Carmichael (uncredited)
![Oscar Blank]()
Oscar Blank
Man in Church (uncredited)
![Hazel Boyne]()
Hazel Boyne
Screaming Woman (uncredited)
Chet Brandenburg
Man in Church (uncredited)
![George Bruggeman]()
George Bruggeman
Soldier (uncredited)
Nora Bush
Woman in Church (uncredited)
![Tony Butala]()
Tony Butala
Boy in Final Church (uncredited)
![Mushy Callahan]()
Mushy Callahan
Burning Soldier at Pit (uncredited)
![Dick Cherney]()
Dick Cherney
Looter (uncredited)
Edward Colmans
Spanish Priest (uncredited)
![James Conaty]()
James Conaty
Man at Pacific Institute of Science and Technology (uncredited)
Russ Conway
Rev. Bethany (uncredited)
![Martin Coulter]()
Martin Coulter
Marine Sergeant (uncredited)
![Vittorio Cramer]()
Vittorio Cramer
First Radio Reporter (uncredited)
Pierre Cressoy
Frenchman (uncredited)
![Oliver Cross]()
Oliver Cross
Scientist (uncredited)
![Jane Crowley]()
Jane Crowley
Woman in Church (uncredited)
![Jim Davies]()
Jim Davies
Marine Commanding Officer (uncredited)
![Helen Dickson]()
Helen Dickson
Woman in Church (uncredited)
Ralph Dumke
Buck Monahan (uncredited)
![Jimmie Dundee]()
Jimmie Dundee
Civil Defense Official (uncredited)
Al Ferguson
Police Chief (uncredited)
![Dick Fortune]()
Dick Fortune
Marine Captain (uncredited)
![Alex Frazer]()
Alex Frazer
Dr. James (uncredited)
![Frank Freeman Jr.]()
Frank Freeman Jr.
Bum #2 Listening to Radio (uncredited)
![Slim Gaut]()
Slim Gaut
Radio Listener (uncredited)
Charles Gemora
Martian (uncredited)
Ned Glass
Well-Dressed Looter (uncredited)
![Jack Gordon]()
Jack Gordon
Man in Church (uncredited)
Fred Graham
Looter (uncredited)
![Joe Gray]()
Joe Gray
Looter (uncredited)
Herman Hack
Worker Listening to Radio (uncredited)
Nancy Hale
Young Wife (uncredited)
![Virginia Hall]()
Virginia Hall
Girl (uncredited)
Ted Hecht
KGEB Reporter (uncredited)
Douglas Henderson
Staff Sergeant (uncredited)
Gertrude Hoffmann
Elderly News Vendor (uncredited)
![Tex Holden]()
Tex Holden
Man in Church (uncredited)
Jimmie Horan
Party Guest (uncredited)
![Patricia Iannone]()
Patricia Iannone
Girl (uncredited)
![Jerry James]()
Jerry James
Reporter (uncredited)
Michael Jeffers
Worker Listening to Radio (uncredited)
Dick Johnstone
Man in Church (uncredited)
Carolyn Jones
Blonde Party Guest (uncredited)
![Don Kohler]()
Don Kohler
Colonel (uncredited)
Ivan Lebedeff
Dr. Gratzman (uncredited)
Freeman Lusk
Secretary of Defense (uncredited)
Herbert Lytton
Chief of Staff (uncredited)
Wilbur Mack
Official (uncredited)
George Magrill
Traffic Cop (uncredited)
Mike Mahoney
Townsman (uncredited)
![John Mansfield]()
John Mansfield
Man (uncredited)
Joel Marston
Military Policeman in Jeep (uncredited)
![Sydney Mason]()
Sydney Mason
Fire Chief, Crew #3 (uncredited)
John Maxwell
Doctor (uncredited)
Mathew McCue
Man in Church (uncredited)
David McMahon
Minister, First Church (uncredited)
![William Meader]()
William Meader
P.E. Official (uncredited)
Lee Miller
Reporter (uncredited)
![Ralph Montgomery]()
Ralph Montgomery
Los Angeles Red Cross Official (uncredited)
Alvy Moore
Zippy (uncredited)
Bob Morgan
Injured Civil Defense Worker (uncredited)
Charles Morton
Worker Listening to Radio (uncredited)
George Nardelli
Military Officer (uncredited)
![Stanley Orr]()
Stanley Orr
Marine Major (uncredited)
George Pal
Bum #1 Listening to Radio (uncredited)
![Walter Richards]()
Walter Richards
Reporter (uncredited)
Robert Rockwell
Forest Ranger at Crash Site (uncredited)
Walter Sande
Sheriff Bogany (uncredited)
James Seay
Air Force Bomber Pilot (uncredited)
![Allen D. Sewall]()
Allen D. Sewall
Man in Church (uncredited)
![Lucile Sewall]()
Lucile Sewall
Woman in Church (uncredited)
![Cora Shannon]()
Cora Shannon
Old Woman (uncredited)
David Sharpe
Looter (uncredited)
Teru Shimada
Japanese Diplomat (uncredited)
![Reginald Lal Singh]()
Reginald Lal Singh
Military Officer (uncredited)
![Bobby Somers]()
Bobby Somers
Deputy at Crash Site (uncredited)
![Bert Stevens]()
Bert Stevens
Man in Church (uncredited)
![Charles Stewart]()
Charles Stewart
Marine Captain (uncredited)
![Jack Stoney]()
Jack Stoney
Looter (uncredited)
![Gus Taillon]()
Gus Taillon
Elderly Man (uncredited)
![Morton C. Thompson]()
Morton C. Thompson
Reporter (uncredited)
Arthur Tovey
Party Guest (uncredited)
Dale Van Sickel
Looter (uncredited)
Dorothy Vernon
Elderly Woman at Square Dance (uncredited)
Anthony Warde
Military Police Driver (uncredited)
![Bob Whitney]()
Bob Whitney
Military Officer (uncredited)
![Chalky Williams]()
Chalky Williams
Worker Listening to Radio (uncredited)
![Waldon Williams]()
Waldon Williams
Boy (uncredited)
![Bud Wolfe]()
Bud Wolfe
Rescuing Civil Defense Worker (uncredited)
![Fred Zendar]()
Fred Zendar
Marine Lieutenant (uncredited)
