Daughters of Darkness is presumably named after the movie Les Lèvres Rouges (Daughters of Darkness), released 1971 and directed by Harry Kümel. Santa Sangre Part I & II is presumably named after the movie Santa Sangre, released 1989 and directed by Alejandro Jodorowsky. Body Double is presumably named after the movie Body Double, released 1984 and directed by Brian De Palma. Apparently The Invisibles is also the title of a comic book published by Vertigo, an imprint of DC Comics. It's not a horror movie like many of the the other tracks reference, but NSB are known to love comic books. Not as sure about this one though.