Assignment Terror
Los monstruos del terror (original)
Aliens from a dying world plot to conquer earth by praying on man's superstitions. Bringing two dead scientists (Michael Rennie and Karin Dor) back to life, they use their knowledge to re-animate various earth monsters, including the werewolf Waldemar Daninsky, Frankenstein's monster (both played by Jacinto Molina), the mummy Tao-Tet, and the vampire Count de Meirhoff.
Starring Michael Rennie, Karin Dor, Craig Hill, Patty Shepard, Ángel del Pozo, Paul Naschy, Manuel de Blas, Ferdinando Murolo, Gene Reyes, Paul Cross
Watch "Assignment Terror" from streaming services Tubi TV, FlixOlè released in 1970. It's a science-fiction and horror movie, and has a rating of 4.1 out of 10 from Imdb which is fairly low for this kind of movie.