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ITV go through every step of the police investigation, in a crime described by prosecutor John McDermott QC as one of "demonic savagery". This one-off doc follows lead Detective Paul Withers as he works with his team in the Lancashire Police to uncover the mystery behind the ‘targeted and ferocious’ attack on Hartley. The 90 minute special covers the entire story up until the conviction of killers Sarah Williams and Katrina Walsh.

How to Watch The Murder of Sadie Hartley Legally and Safely

If you want to stream The Murder of Sadie Hartley 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 Murder of Sadie Hartley 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.