The Serpent
Vlassov is a Soviet spy who defects in France. He is whisked to the U.S, where Allan Davies takes over the case. After polygraph tests and cross-examinations, Vlassov names several Western European agents who are also spying for the Soviets. Davies wants to take the listed agents into custody; meanwhile, those on the list start dying under mysterious circumstances.
Top cast
Below are the streaming services currently carrying the movie “The Serpent” 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 Serpent in United Kingdom
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Availability can change as licenses rotate — confirm on the provider’s page before subscribing. Last checked: 13 Sept 2026.