Mil Mascaras investigates a nest of fifth-columnists operating out of a carnival (!) led by a Nazi (John Carradine) attempting to resurrect the Third Reich posing as a circus clown .
Director
Federico Curiel
María Duval
Sandra / Tamara
Isela Vega
Estrella
David Silva
Señor Robles
Eric del Castillo
Sandokan
John Carradine
Mad Doctor / Nazi Leader
Víctor Junco
Renzo
Dagoberto Rodríguez
Víctor Alcocer
Commander (uncredited)
Fernando Osés
Circus Man (uncredited)