Marcos (cantinero)
Doctor
Old Scientist
Police Chief
Arena Owner
Ramón Mendecochea
Fiscal (uncredited)
Guillermo
Prof. Rafael Petra Santa
Don Ramón Cifuentes
Marinero Italiano
Don Carlos
Luis
Inspector
Boris
Dr. Sepúlveda
Comandante
Pacomio Rodríguez
Fermín Mendoza
Abuelo de Valentín
Sacerdote
Landeros
Dr. Sepúlveda
(uncredited)
Esposo de Rosario
o. A.
Silverio
Doctor anciano
Hipolito Gutierrez
Professor Soler
Lupe Santana
Cugat
Don Ramón
Professor Soler
Dr. Sepúlveda
Acébal
Prof. Luis Cristaldi
The Doctor
Chairman of Scientific Society
Fray Pedro
(uncredited)
Ugo Brunelli
Sacerdote
Dr Enrique Conde
Mario Arévalo
Don Cefe
Tata
Doctor