Générique complet
Les Creatures de Kolos
George Nader
Glenn Martin
Barbara Nichols
Gale Wilson
George Macready
Prof. Vaughn Dornheimer
Dolores Faith
Lisa Dornheimer
Hugh Beaumont
Austin Welles
Richard Arlen
National Intelligence
Richard Kiel
Dr. Kolos
John Indrisano
Thor, the Butler
Ted Durant
The Galaxy Being
Tommy Leonetti
Reporter (uncredited)
Walter Maslow
Larry Barton
Lori Lyons
Benito Prezia
Margaret Teele
Blonde Lab Assistant
Alean 'Bambi' Hamilton
Brunette Lab Assistant
Walter Abel
Dr. Munson
Lon Satton
Mel Ruick
Dr. Munson (as Melville Ruick)
Kim Satana
Dr. Lin Yung
John Dasten
(as John Daston)
Richard Schuyler
William White
(as Bill Hampton)
Lon Satton
Reporter (uncredited)
Andrew Johnson
(Uncredited)
Réalisation
Hugo Grimaldi
Réalisation
Jesse Corallo
Assistant réalisation
Clancy Herne
Second Assistant Director
Scénario
Production
Lawrence Woolner
Production exécutive
Hugo Grimaldi
Production
Arthur C. Pierce
Production
Jesse Corallo
Production Manager
Marvin Paige
Casting Consultant
Image
Montage
Son et musique
Jean G. Valentino
Mixage
Robert Reeve
Sound Effects Editor
Robert Glenn
Sound Editor
Gordon Zahler
Music Director
Igo Kantor
Music Editor
Walter Greene
Musique
Hans J. Salter
Musique
Leith Stevens
Musique
Décors
Costumes et maquillage
Mickey Meyers
Costumes
Bob Mark
Maquillage
Kay Shea
Coiffure
John Chambers
Special Effects Makeup Artist