莱斯·崔梅恩
Les Tremayne
饰：Maj. Gen. Mann
罗伯特·科恩斯韦特
Robert Cornthwaite
饰：Dr. Pryor (as Bob Cornthwaite)
Sandro Giglio
饰：Dr. Bilderbeck
保罗·费斯
Paul Frees
饰：Second Radio Reporter,Opening Announcer
亨利·布兰登
Henry Brandon
饰：Cop at Crash Site
塞德里克·哈德威克
Cedric Hardwicke
饰：Commentary (as Sir Cedric Hardwicke)
克利夫·克拉克
Cliff Clark
饰：Australian Policeman (scenes deleted)
Rudy Lee
饰：Boy (scenes deleted)
Eric Alden
Eric Alden
饰：Man (uncredited)
埃德加·巴里尔
Edgar Barrier
饰：Prof. McPherson (uncredited)
Russ Bender
Russ Bender
饰：Dr. Carmichael (uncredited)
保罗·伯奇
Paul Birch
饰：Alonzo Hogue (uncredited)
安·科迪
Ann Codeé
饰：Dr. Duprey (uncredited)
Edward Colmans
饰：Spanish Priest (uncredited)
詹姆斯·科纳蒂
James Conaty
饰：Man at Pacific Institute of Science and Technology (uncredited)
拉斯·康威
Russ Conway
饰：Rev. Bethany (uncredited)
吉米·邓迪
Jimmie Dundee
饰：Civil Defense Official (uncredited)
Al Ferguson
Al Ferguson
饰：Police Chief (uncredited)
内德·格拉斯
Ned Glass
饰：Well-Dressed Looter (uncredited)
弗莱德·格兰姆
Fred Graham
饰：Looter (uncredited)
Joe Gray
饰：Looter (uncredited)
Jerry James
饰：Reporter (uncredited)
Frank Kreig
饰：Fiddler Hawkins (uncredited)
Ivan Lebedeff
饰：Dr. Gratzman (uncredited)
Herbert Lytton
饰：Chief of Staff (uncredited)
乔治·麦格瑞
George Magrill
饰：Traffic Cop (uncredited)
迈克·马奥尼
Mike Mahoney
饰：Young Man (uncredited)
Sydney Mason
饰：Fire Chief, Crew #3 (uncredited)
Bill Meader
Bill Meader
饰：P.E. Official (uncredited)
李·米勒
Lee Miller
饰：Reporter (uncredited)
拉尔夫·蒙哥马利
Ralph Montgomery
饰：Los Angeles Red Cross official (uncredited)
沃尔特·桑德
Walter Sande
饰：Sheriff Bogany (uncredited)
James Seay
饰：Air Force Bomber Pilot (uncredited)
大卫·夏普
David Sharpe
饰：Looter (uncredited)
伯特史蒂文斯
Bert Stevens
饰：Man in Church (uncredited)
Charles Stewart
Charles Stewart
饰：Marine Captain (uncredited)
Dale Van Sickel
饰：Looter (uncredited)
Dorothy Varden
饰：Elderly Woman (uncredited)
吉恩·巴瑞
Gene Barry
饰：Dr. Clayton Forrester
安·鲁滨逊
Ann Robinson
饰：Sylvia Van Buren
Lewis Martin
饰：Pastor Dr. Matthew Collins
Houseley Stevenson Jr.
饰：Gen. Mann's aide (as Housely Stevenson Jr.)
威廉·菲普斯
William Phipps
饰：Wash Perry (as Bill Phipps)
Vernon Rich
饰：Col. Ralph Heffner
杰克·克鲁申
Jack Kruschen
饰：Salvatore
Peter Adams
饰：Pine Summit Fire Watcher (uncredited)
Hugh Allen
饰：Brigadier General (uncredited)
Ruth Barnell
饰：Mother (uncredited)
Hazel Boyne
饰：Screaming Woman (uncredited)
Tony Butala
饰：One of 3 Boys in Final Church Scene (uncredited)
Mushy Callahan
饰：Burning Soldier at Pit (uncredited)
Martin Coulter
饰：Marine Sergeant (uncredited)
Vittorio Cramer
饰：First Radio Reporter (uncredited)
皮埃尔·克雷索伊
Pierre Cressoy
饰：Man (uncredited)
Jim Davies
饰：Marine Commanding Officer (uncredited)
海伦·迪克森
Helen Dickson
饰：Woman in Church (uncredited)
Ralph Dumke
饰：Buck Monahan (uncredited)
Dick Fortune
饰：Marine Captain (uncredited)
Alex Frazer
饰：Dr. James (uncredited)
Frank Freeman Jr.
饰：Bum #2 Listening to Radio (uncredited)
Charles Gemora
饰：Martian (uncredited)
Nancy Hale
Nancy Hale
饰：Young Wife (uncredited)
Virginia Hall
饰：Girl (uncredited)
Ted Hecht
饰：KGEB Reporter (uncredited)
Douglas Henderson
饰：Staff Sergeant (uncredited)
Gertrude Hoffman
饰：Elderly Woman News Vendor (uncredited)
Patricia Iannone
饰：Girl (uncredited)
Don Kohler
饰：Colonel (uncredited)
Freeman Lusk
饰：Secretary of Defense (uncredited)
John Mansfield
饰：Man (uncredited)
乔尔·马斯顿
Joel Marston
饰：MP in Jeep (uncredited)
马修麦凯
Matthew McCue
饰：Man in Church (uncredited)
David McMahon
饰：Minister, First Church (uncredited)
艾维·摩尔
Alvy Moore
饰：Zippy (uncredited)
Bob Morgan
Bob Morgan
饰：Injured Civil Defense Worker (uncredited)
Stanley Orr
饰：Marine Major (uncredited)
乔治·帕尔
George Pal
饰：Bum #1 Listening to Radio (uncredited)
Walter Richards
饰：Reporter (uncredited)
罗伯特·洛克威尔
Robert Rockwell
饰：Forest Ranger at Crash Site (uncredited)
Cora Shannon
饰：Old Woman (uncredited)
泰鲁·岛田绅助
Teru Shimada
饰：Japanese Diplomat (uncredited)
Bobby Somers
饰：Deputy at Crash Site (uncredited)
杰克·斯托尼
Jack Stoney
饰：Looter (uncredited)
Gus Taillon
饰：Elderly Man (uncredited)
Morton C. Thompson
饰：Reporter (uncredited)
Edward Wahrman
饰：Cameraman (uncredited)
Anthony Warde
饰：Military Police Driver (uncredited)
Waldon Williams
饰：Boy (uncredited)
Bud Wolfe
饰：Rescuing Civil Defense Worker (uncredited)
Fred Zendar
饰：Marine Lieutenant (uncredited)