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Follows the story of a young woman who commits horrific acts of violence and rage, and to her surprise, has no idea why. And the investigator who becomes obsessed with the case and is determined to dig into her past and figure out "why" this is happening.

How to Watch The Sinner Legally and Safely

If you want to stream The Sinner 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 The Sinner 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.