Secret of Death
Mil Mascaras investigates a nest of fifth-columnists operating out of a carnival led by a Nazi attempting to resurrect the Third Reich posing as a circus clown.
| Actor | Role |
|---|---|
 Mil MáscarasMil Máscaras | Mil Máscaras |
 John CarradinePolito the Clown | Polito the Clown |
 María DuvalSandra / Tamara | Sandra / Tamara |
 Isela VegaEstrella | Estrella |
 David SilvaSeñor Robles | Señor Robles |
 Eric del CastilloSandokan | Sandokan |
 Víctor JuncoRenzo | Renzo |
 Nathanael LeónHercules | Hercules |
 Dagoberto RodríguezNot listed | Not listed |
| AAltia MichelNot listed | Not listed |
 Víctor AlcocerCommander (uncredited) | Commander (uncredited) |
 Fernando OsésCircus Man (uncredited) | Circus Man (uncredited) |
| PPatricia FerrerNot listed | Not listed |
 SantanónDwarf Clown | Dwarf Clown |
 Juan GarzaNot listed | Not listed |
 Dorrel DixonLuchador | Luchador |
| SSandra ChávezCircus woman | Circus woman |
| JJesús Gómez MurguíaCarson | Carson |