彼得·格雷夫斯

Peter Graves

饰：Dr. Ed Wainwright

佩姬·卡索

Peggie Castle

饰：Audrey Aimes

莫里斯·安克鲁姆

Morris Ankrum

饰：Gen. John Hanson

Than Wyenn

饰：Frank Johnson

托马斯·布朗·亨利

Thomas Browne Henry

饰：Col. Tom Sturgeon

理查德·贝内迪克特

Richard Benedict

饰：Cpl. Mathias

James Seay

饰：Capt. James Barton

John Close

饰：Maj. Everett

唐·C·哈维

Don C. Harvey

饰：Guard at lab

拉里·J·布莱克

Larry J. Blake

饰：Patrolman

Eilene Janssen

饰：Teenager necking in car

弗兰克·维尔考克斯

Frank Wilcox

饰：Gen. John T. Short

Douglas Evans

饰：Norman Taggart (news editor)

保罗·格兰特

Paul Grant

饰：Teenage Boy in Car

Richard Emory

饰：Lieutenant

Hank Patterson

饰：Dave

Steve Warren

Steve Warren

饰：Observation Post #3 soldier

Frank Connor

Frank Connor

饰：Observation Post #1 soldier

唐·艾特纳

Don Eitner

饰：Observation Post #2 soldier

Rayford Barnes

饰：Chuck (National Guard corporal)

柯克·阿林

Kirk Alyn

饰：Bomber pilot (uncredited)

比尔·鲍德温

Bill Baldwin

饰：TV announcer (uncredited)

弗兰克·蔡斯

Frank Chase

饰：Helicopter pilot (uncredited)

詹姆斯·道格拉斯

James Douglas

饰：Army sentry (uncredited)

保罗·费斯

Paul Frees

饰：Helicopter pilot (dubbed voice) (uncredited)

Lyle Latell

饰：Police Lt. MacKenzie (uncredited)

Dennis Moore

饰：Police dispatcher (uncredited)

Zon Murray

饰：National Guard sergeant (uncredited)

艾伦雷诺兹

Alan Reynolds

饰：Insecticide Man (uncredited)

Ralph Sanford

饰：Extra standing beside Red Cross representative (uncredited)

伯特史蒂文斯

Bert Stevens

饰：Col. Hill (uncredited)

Alan Wells

饰：Headquarters sergeant (uncredited)

Hylton Socher

饰：Frank (a soldier)

Patricia Dean

Patricia Dean

饰：Red Cross representative (uncredited)