Leonora Ruffo

Kaena

Mario Novelli

Ingegner Paolo Bardi (as Anthony Freeman)

Roland Lesaffre

Prof. Solmi

Kirk Morris

Belsy

Gordon Mitchell

Murdu

Alfio Caltabiano

Artie

Leontine May

Luisa Solmi

Nando Angelini

Ingegner Morelli

Giovanni De Angelis

Giulio

Mirella Pamphili

(credit only)

John Sun

Dr. Chang

Antonio Ho

Chinese Secret Agent

John Chen

Chinese Secret Agent

Pietro Francisci

Himself (uncredited)

Renato Montalbano

The Doctor at the casualty department (uncredited)

Gianni Solaro

The Director of the Research Institute (uncredited)