George Nader

Glenn Martin

Acting

Barbara Nichols

Gale Wilson

Acting

George Macready

Prof. Vaughn Dornheimer

Acting

Dolores Faith

Lisa Dornheimer

Acting

Hugh Beaumont

Austin Welles

Acting

Richard Arlen

National Intelligence

Acting

Richard Kiel

Dr. Kolos

Acting

John Indrisano

Thor, the Butler

Acting

Ted Durant

The Galaxy Being

Acting

Tommy Leonetti

Reporter (uncredited)

Acting

Walter Maslow

Acting

Larry Barton

Acting

Lori Lyons

Acting

Benito Prezia

Acting

Margaret Teele

Blonde Lab Assistant

Acting

Alean 'Bambi' Hamilton

Brunette Lab Assistant

Acting

Walter Abel

Dr. Munson

Acting

Lon Satton

Acting

Mel Ruick

Dr. Munson (as Melville Ruick)

Acting

Kim Satana

Dr. Lin Yung

Acting

John Dasten

(as John Daston)

Acting

Richard Schuyler

Acting

William White

(as Bill Hampton)

Acting

Lon Satton

Reporter (uncredited)

Acting

Andrew Johnson

(Uncredited)

Acting