Richard Kiel

Dr. Kolos

Lon Satton

Reporter (uncredited)

Arthur C. Pierce

Writer

George Macready

Prof. Vaughn Dornheimer

George Nader

Glenn Martin

Barbara Nichols

Gale Wilson

Dolores Faith

Lisa Dornheimer

Hugh Beaumont

Austin Welles

Richard Arlen

National Intelligence

John Indrisano

Thor, the Butler

Ted Durant

The Galaxy Being

Tommy Leonetti

Reporter (uncredited)

Walter Maslow

Actor

Larry Barton

Actor

Lori Lyons

Actor

Benito Prezia

Actor

Margaret Teele

Blonde Lab Assistant

Alean 'Bambi' Hamilton

Brunette Lab Assistant

Walter Abel

Dr. Munson

Mel Ruick

Dr. Munson (as Melville Ruick)

Kim Satana

Dr. Lin Yung

John Dasten

(as John Daston)

Richard Schuyler

Actor

William White

(as Bill Hampton)

Hugo Grimaldi

Director

Lawrence Woolner

Executive Producer