Stephen Forsyth
John Harrington
Dagmar Lassander
Helen Wood
Laura Betti
Mildred Harrington
Jesús Puente
Inspector Russell (as Jesus Puente)
Femi Benussi
Alice Norton
Antonia Mas
Louise
Luciano Pigozzi
Vences (as Alan Collin)
Gérard Tichy
Dr. Kalleway (as Gerard Tichy)
Verónica Llimerá
Betsy Wester (as Veronica Llimera)
Pasquale Fortunato
John Harrington as a Boy (as Fortunato Pascuale)
Ignasi Abadal
Jimmy Kane (as José Ignacio Abadaz)
Silvia Lienas
Vicky
Montserrat Riba Vidal
Rosy Miller (as Monserrat Riba)
Susy Andersen
Sdenka (archive footage) (uncredited)
Guido Barlocci
Unknown (uncredited)
Bruno Boschetti
Policeman (uncredited)
Elina De Witt
Model (uncredited)
Rika Dialina
Maria (archive footage) (uncredited)
Boris Karloff
Gorca (archive footage)
Glauco Onorato
Giorgio (archive footage) (uncredited)