迈克尔·凯恩

Michael Caine

饰：Dr. Bradford Crane

凯瑟琳·罗斯

Katharine Ross

饰：Capt. Helena Anderson

理查德·韦德马克

Richard Widmark

饰：Major General Thalius Slater

理查德·张伯伦

Richard Chamberlain

饰：Dr. Hubbard

奥利维娅·德哈维兰

Olivia de Havilland

饰：Maureen Schuster

本·约翰逊

Ben Johnson

饰：Felix

何塞·费勒

José Ferrer

饰：Dr. Andrews (as Jose Ferrer)

帕蒂·杜克

Patty Duke

饰：Rita (as Patty Duke Astin)

斯利姆·佩金斯

Slim Pickens

饰：Jud Hawkins

布拉福德·迪尔曼

Bradford Dillman

饰：Major Baker

弗莱德·麦克莫瑞

Fred MacMurray

饰：Mayor Clarence Tuttle

亨利·方达

Henry Fonda

饰：Dr. Walter Krim

卡梅隆·米切尔

Cameron Mitchell

饰：General Thompson

Christian Juttner

饰：Paul Durant

亚历杭德罗·雷伊

Alejandro Rey

饰：Dr. Martinez

唐·瑞德·巴里

Don 'Red' Barry

饰：Pete Harris

帕特里克·卡利顿

Patrick Culliton

饰：Sheriff Morrison

厄尔尼·F·奥萨蒂

Ernie F. Orsatti

饰：Duty Officer (as Ernie Orsatti)

John Furlong

饰：Cameraman

Stephen Powers

Stephen Powers

饰：Radarman

阿雷尔·布兰顿

Arell Blanton

饰：Sergeant

Trent Dolan

Trent Dolan

饰：Radio Sergeant

John Williams

饰：Launching Officer

史蒂文·马罗

Steven Marlo

饰：Pilot #1 (as Steve Marlo)

Marcia Nicholson

饰：Captain

Arthur Space

饰：Engineer

查克·海沃德

Chuck Hayward

饰：Standby Engineer

Art Balinger

饰：Radio Announcer

Michael Sheehan

饰：Airman #1

Howard Culver

饰：Airman #2

Barbara Costello

饰：Receptionist,Nurse (extended version only)

Jim Galante

Jim Galante

饰：Doctor (extended version only)

Elizabeth Rogers

饰：Scientist (extended version only)

Marneen Fields

饰：Train Passenger (uncredited)

摩根·保罗

Morgan Paull

饰：Dr. Newman

约翰·奥特林

John Otrin

饰：Wild Lines (uncredited)

Doria Cook-Nelson

Doria Cook-Nelson

饰：Mrs. Mary Durant (as Doria Cook)

Robert Varney

饰：Mr. Durant

Chris Petersen

饰：Hal

Jerry Toomey

饰：Eddie

Mara Cook

饰：Secretary

Joey Eisnach

饰：Bee Boy

Chris Capen

Chris Capen

饰：Lieutenant

Tony Haig

饰：Officer #2

Bill Snider

饰：Radarman #2

George Simmons

饰：Nurse (as George Simmons)

Phil Montgomery

饰：Mechanic

James Turley

饰：Reverend (as James Austin Turley)

Frank Blair

Frank Blair

饰：Himself

Glenn Charles Lewis

饰：Chemical Warfare Guard

David Himes

饰：Radioman (extended version only)

Jenifer Taurins

饰：Nurse (extended version only)

Larry Moran

饰：Colonel's Son (uncredited)

李·格兰特

Lee Grant

饰：Anne MacGregor

奥莉薇·黛·哈佛兰

Olivia de Havilland

饰：Maureen Schuster