******SPACESHIP-SIZED SPOILERS!****** In 1965, famed gothic horror filmmaker Mario Bava (1914-1980)—director of movies such as “Black Sunday,” “Blood and Black Lace,” and “Black Sabbath”—made a rare foray into science fiction. While “Planet of the Vampires” (original Italian title, “Terrore nello Spazio”) isn’t representative of Bava’s best work, it’s among his most visually creative, influencing generations…