John McLaren
Paul Hubschmid
Katy Dandridge
Madeleine Fischer
Stuart (uncredited)
Giacomo Rossi Stuart
Landowsky (uncredited)
Gérard Landry
John McLaren (uncredited) (voice)
Shane Rimmer
Mary McLaren
Fiorella Mari
Professor Herbert Weisse
Ivo Garrani
Peter Leduq
Dario Michaelis
Randowsky
Sam Galter
Sergei Boetnikov
Jean-Jacques Delbo
General van Dorff (uncredited)
Peter Meersman
Dennis McLaren (uncredited)
Massimo Zeppieri
Lab Assistant (uncredited)
Annie Bernal
Director of Photography
Mario Bava
Director
Paolo Heusch
Executive Producer
Samuel Z. Arkoff
Original Music Composer
Carlo Rustichelli
Producer
Guido Giambartolomei
Screenplay
Marcello Coscia
Hairstylist
Ada Palombi
Production Manager
Armando Morane
Sandro Continenza
Production Design
Beni Montresor
Story
Virgilio Sabel
Makeup Artist
Angelo Malantrucco
Camera Operator
Ubaldo Terzano
Editor
Otello Colangeli