Diary of a Madman
We don’t recommend it under 13. Horror with murders and possession.
Reason translated with AI from our Spanish original.
Good to know
- Scary scenes
- Frightening villains, monsters, transformations or jump scares.
- Fighting or violence
- Punches, weapons, injuries; slapstick barely counts.
High confidence
High confidence · All three models agree and know the movie well.
Where to watch
UK
Not on streaming services in the UK right now.
US
Included with subscription: fuboTV · MGM+ · Philo · ScreenPix
Free (with ads): Tubi
Spain
Included with subscription: Filmin
Availability as of 17 October 2026. Data from JustWatch.
TMDb user score
What it’s about
Simon Cordier, a French magistrate and amateur sculptor comes into contact with a malevolent entity. The invisible - yet corporeal - being, called a "horla" is capable of limited psychokinesis and complete mind control.
Genres: Horror
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This product uses the TMDB API but is not endorsed or certified by TMDB. Streaming data: JustWatch.