Earth vs. the Flying Saucers

Hugh Marlowe
Dr. Russell A. Marvin

Joan Taylor
Carol Marvin

Donald Curtis
Maj. Huglin

Morris Ankrum
Brig. Gen. John Hanley

Thomas Browne Henry
Vice Adm. Enright

Grandon Rhodes
Gen. Edmunds

John Zaremba
Prof. Kanter

Paul Frees
Alien (voice)

Frank Wilcox
Alfred Cassidy

Sydney Mason
Frank the garage man

Larry J. Blake
Motorcycle cop

Bert Stevens
Air Intelligence Command Officer

Forbes Murray
Military Officer at Experiment

Arthur Tovey
Officer/Civilian at Military Conference

Alan Wells
Major Kimberly

Nicky Blair
Military Officer at Experiment (uncredited)

Jimmy Cross
Military Messenger (uncredited)

Jack Deery
Military Officer (uncredited)

Charles Evans
Dr. Alberts (uncredited)

Raoul Freeman
Military Official (uncredited)