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I, Monster
- Jaar: 1971
- Land: United Kingdom
- Genre: Horror, Science Fiction
- Studio: Amicus Productions, British Lion Film Corporation
- Sleutelwoord: based on novel or book, mad scientist, victorian england, murder, doctor, jekyll and hyde, split personality, killing a cat
- Direkteur: Stephen Weeks
- Gooi: Christopher Lee, Peter Cushing, Mike Raven, Richard Hurndall, George Merritt, Kenneth J. Warren