This movie is appeared on MST3K as episode 818 and is a sordid little tale of a man and his evil puppet starring Bryant Halliday, who also appears in MST3K episode 901: The Projected Man, and 2001: A Space Odyssey's own Haywood Floyd, AKA William Sylvester. Very disturbing and uber-creepy, the "doll" of the title, Hugo, is inhabited by the spirit of the movies antagonist's former assistant, whom said antagonist, The Great Vorelli, mindfreaks and steals his soul, then, ultimately but "accidently" kills. Old Willy Sylvester, the protagonist, is the boyfriend of fake-eyelashed looker Marian, who is also being mindfreaked, as well as bedfreaked (upperback fetishes are GROSS) by Vorelli. To round it all out, there is a very noticably huge-butted woman, Vorelli's current assistant, who is killed in a most ridiculous way, knifed to death by Hugo the puppet because of a comment by Vorelli: "She said you were UGLY." What a dope. The ending is bland and substantially unsurprising, with an obvious last line that will make you slap your forehead and moan, "Ugh!" Although the movie lacks thrills as much as naked mole rats lack fur,
Devil Doll is a very cool episode of MST3K. I would suggest you watch the movie by itself first, then watch the MSTed version that will make you chuckle uncontrollably.