The Key
A college professor wants to bring the joys of sex to his frigid wife. He convinces his son in law to sleep with her because the idea arouses him, while also making him insanely jealous. The professor keeps a journal of his fantasies in a locked cupboard and hopes that his wife will find the key and read it.
Below are the streaming services currently carrying the movie “The Key” 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 The Key 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: 17 Sept 2026.