休·马洛威

Hugh Marlowe

饰：Dr. Russell A. Marvin

琼·泰勒

Joan Taylor

饰：Carol Marvin

唐纳德·柯蒂斯

Donald Curtis

饰：Maj. Huglin, Liason Officer

莫里斯·安克鲁姆

Morris Ankrum

饰：Brig. Gen. John Hanley

约翰·伦巴

John Zaremba

饰：Prof. Kanter

托马斯·布朗·亨利

Thomas Browne Henry

饰：Vice Adm. Enright (as Tom Browne Henry)

格兰丁·罗德

Grandon Rhodes

饰：Gen. Edmunds

拉里·J·布莱克

Larry J. Blake

饰：Motorcycle cop (as Larry Blake)

Fred Aldrich

饰：Airplane Passenger,Officer in Sighting Montage,Man in Saucer Att

豪利本

Holly Bane

饰：Bit Role (uncredited) (unconfirmed)

尼基·布莱尔

Nicky Blair

饰：Military Officer at Experiment (uncredited)

Charles Evans

Charles Evans

饰：Dr. Alberts (uncredited)

保罗·费斯

Paul Frees

饰：Narrator,Alien Voice (uncredited)

Duke Green

饰：Bit Role (uncredited)

Clark Howat

饰：Sgt. Nash (uncredited)

哈里·劳特

Harry Lauter

饰：Cutting, Generator technician (uncredited)

Don Marlowe

饰：Bit Role (uncredited) (unconfirmed)

Forbes Murray

Forbes Murray

饰：Military Officer at Experiment (uncredited)

艾伦雷诺兹

Alan Reynolds

饰：Maj. Kimberly (uncredited)

伯特史蒂文斯

Bert Stevens

饰：Officer in UFO Sighting Montage (uncredited)

Arthur Tovey

饰：Officer,Civilian at Military Conference (uncredited)

Dale Van Sickel

饰：Crushed Beneath Wall (uncredited)

弗兰克·维尔考克斯

Frank Wilcox

饰：Alfred Cassidy (uncredited)

Beal Wong

饰：Radio Listener in China (uncredited)

威廉·伍德森

William Woodson

饰：Off-Screen Narrator (uncredited) (unconfirmed)

保罗·费斯

Paul Frees

饰：演员 Actor/Actress