EL Asesino Invisible (1965)

aka's: EL Enmascarado De Oro Contra EL Asesino Invisible/Man In The Golden Mask Vs. The Invisible Assassin/The Invisible Assassin/Neutron Traps The Invisible Killers

Obscure masked wrestler film pits the heroic “Gold Mask” against an invisible homicidal maniac. Spanish actress Ana Bertha Lepe wears an incredibly revealing costume in the closing musical number. Also stars Guillermo Murray and Carlos Agosti. Also with Adriana Roel, Miguel Arenas and Jorge Rivero. Directed by Rene Cardona. (In Spanish language).

NOTE: This film was released in the U.S. as Neutron Traps The Invisible Killers. However, it's neither part of the Neutron series, nor does it feature Wolf Ruvinskis, who starred in the original Neutron films.