Agent X1-7

Lang Jeffries

George Collins

Aurora de Alba

Olga

Rafael Bardem

Professor Calvert

Eleonora Bianchi

Gloria Fernán Osuna

Wladimiro Tuicovich

Ángel Jordán

Moa Tahi

Joe Kamel

Nando Angelini

Gianni Solaro

C.I.A. Manager

Aldo Bonamano

Andrea Scandurra

Rocco Lerro

A lab guardian (uncredited)