Night of San Juan: Santo in Black Gold (1977)
Santo is called in to stop robot terrorists from sabotaging oil supplies in Puerto Rico.
- Country : Puerto Rico, Mexico
- Genre : Action
- Studio : Puerto México Films
- Director : Federico Curiel
- Cast : El Santo, Gilda Haddock, Rossy Mendoza, Luis Daniel Rivera, Roberto Rivera Negrón, Orlando Rodríguez