Quite easily the goriest thing I’d ever seen when I was a youngster. Channel 32 didn’t always check their films for what at the time was inappropriate content; I was pretty freaked out when I saw the carnage in this one, not to mention the film’s entire highly sleazy tone.
Paul Naschy liked the ending enough, though, that he lifted the whole thing for the climax of The Hunchback of the Morgue.