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Sherlock Holmes and Dr. Watson try to track down the Great Mogul, the second-largest diamond in the world.

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The Sign of Four (1983) streaming availability varies by region. Check Netflix, Prime Video, Disney+, and other major platforms. It may also be available for digital rental or purchase on Amazon, Apple TV, or Vudu.
Sherlock Holmes and Dr. Watson try to track down the Great Mogul, the second-largest diamond in the world.
The Sign of Four (1983) was directed by Desmond Davis. The film is a Adventure, Crime production with a runtime of 1h 37m, rated 6.4/10.
The Sign of Four runs 1h 37m (97 minutes total). Audience rating: 6.4/10 from 21 votes. Genre: Adventure, Crime.
The Sign of Four is rated 6.4/10 by 21 viewers — decent with mixed reception. A good pick for Adventure and Crime fans.