Ray Danton as Bryan Cooper / Superdragon

Marisa Mell as Charity Farrel

Margaret Lee as Cynthia Fulton

Jess Hahn as Baby Face

Carlo D'Angelo as Fernand Lamas

Adriana Ambesi as Verna

Marco Guglielmi as Prof. Kurge

Solvi Stübing as Elizabeth

Gérard Herter as Coleman (as Gerard Haerther)

Jacques Herlin as Ross

Carlo Hintermann as Coleman

Pinkas Braun as (uncredited)

Christia Hester as (uncredited)

Benito Stefanelli as Kirk

Artemio Antonini as Van Opel Henchman (uncredited)

Angelo Casadei as Guard at auction

Angelo Infanti as (uncredited)

Renato Romano as Gym Director

Nello Pazzafini as Charity's Bodyguard (uncredited)