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), Alien (voice) (uncredited)

Frank Wilcox

Alfred Cassidy, Alfred Cassidy (uncredited)

Larry J. Blake

Motorcycle cop

Bert Stevens

Air Intelligence Command Officer

Forbes Murray

Military Officer at Experiment, Military Officer at Experiment (uncredited)

Arthur Tovey

Officer/Civilian at Military Conference

Nicky Blair

Military Officer at Experiment (uncredited)

Charles Evans

Dr. Alberts (uncredited)

Clark Howat

Sgt. Nash (uncredited)

Harry Lauter

Cutting - Generator Technician (uncredited)

Sol Murgi

Plane Passenger (uncredited)

Mike Ragan

Tank Commander (uncredited)

Dale Van Sickel

Man Crushed Beneath Wall (uncredited)

William Woodson

Narrator (voice) (uncredited)