杰拉德·摩尔

Gerald Mohr

饰：Col. Thomas O'Bannion

Naura Hayden

饰：Dr. Iris 'Irish' Ryan (as Nora Hayden)

莱斯·崔梅恩

Les Tremayne

饰：Prof. Theodore Gettell

杰克·克鲁申

Jack Kruschen

饰：CWO Sam Jacobs

Paul Hahn

饰：Maj. Gen. George Treegar

J. Edward McKinley

饰：Prof. Paul Weiner

Tom Daly

饰：Dr. Frank Gordon

Don Lamond

饰：TV newscaster (narrator),Martian Voice

Edward Innes

饰：Brig. Gen. Alan Prescott

Gordon Barnes

Gordon Barnes

饰：Maj. Lyman Ross

Jack Haddock

饰：Lt. Col. Davis

Brandy Bryan

Brandy Bryan

饰：Nurse Hayes

Joan Fitzpatrick

Joan Fitzpatrick

饰：Nurse Dixon

Duke Norton

Duke Norton

饰：Dr. Muller

William Remick

饰：Dr. Hawley (as Wm. Remick)

Fred Ross

饰：Air Force news photographer still man

David De Haven

饰：Air Force news photographer still man (as David DeHaven)

Arline Hunter

Arline Hunter

饰：Joan

Alean 'Bambi' Hamilton

Alean 'Bambi' Hamilton

饰：Joan's Friend (as Aleane Hamilton)

Richard Baxter

饰：1st Monitor (uncredited)

泰德·卡西迪

Ted Cassidy

饰：Martian voice (uncredited)

比利•柯蒂斯

Billy Curtis

饰：Martian (uncredited)

Alan Prescott

Alan Prescott

饰：Brigadier General (uncredited)

Billy Snyder

饰：(uncredited)

Ralph Brooks

Ralph Brooks

泰德·卡西迪

Ted Cassidy

Joan Patrick

饰：Nurse Dixon,(as Joan Fitzpatrick)