I Know What I Saw
Mourning the loss of her father, who committed suicide, Mackenzie starts having hallucinations of killing people. They seem so real that she's convinced she's been committing these crimes; however, she can find no evidence to support this. Is she losing her marbles, or is there something sinister at work around her?
Below are the streaming services currently carrying the movie “I Know What I Saw” in the United Kingdom, along with how each offers it (subscription, buy, or rent) and a direct link. Licensing differs by market, so availability in the United Kingdom can differ from other countries.
Where to watch I Know What I Saw in United Kingdom
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Not currently available on the supported providers in United Kingdom.
Availability can change as licenses rotate — confirm on the provider’s page before subscribing. Last checked: 22 Sept 2026.