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After the death of his son, Fan Kwok Sang develops a mental disorder and accidentally kills his wife, Wai Ling, in front of her mother. He was then committed to a psychiatric hospital and after three years Dr. Chow Ming Kit believes Fan is ready to be released . However, Fan can’t adjust to his new life, especially with his Mother-in-Law paying often, troublesome visits. Dr. Chow begins to obsess over Fan’s treatment to preserve his status and reputation.

How to Watch Insanity Legally and Safely

If you want to stream Insanity through reputable and legal services, there are a few good options depending on where you are. Subscription platforms like HBO Max, Disney+, Netflix, Amazon Prime Video, and Apple TV+ sometimes carry Insanity films or related DC titles—though availability depends on your country.

If you’d rather not commit to a subscription, there are ad‑supported, free (but legal) platforms such as Tubi, Pluto TV, Peacock or Crackle (where available in your region) that occasionally host superhero films.

Lastly, don’t forget about library‑linked streaming options like Kanopy or Hoopla (if your library or university is registered), and official uploads by film distributors on YouTube—these can also give you legal access to classic movies.