The Sign of Four

Name: The Sign of Four
Genre: Mystery, Crime
Released: 1983-01-01
Rating: 6.3
Cast: Ian Richardson, David Healy, Thorley Walters, Michael O'Hagan, Cherie Lunghi

1983| 1h 36m| IMDb 6.3

The Sign of Four (1983) is currently streaming in the UK on Prime Video. Last updated 10 April 2026.

Streaming availability last checked 10 April 2026

Mystery Crime

A young woman hires Sherlock Holmes and Dr. Watson to look into her father's friends' mysterious deaths and find the world's second-largest diamond.

Director: Desmond Davis

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£8.99/mo

Streaming info last checked: 10 Apr 2026

Cast

Ian Richardson

Sherlock Holmes

David Healy

Dr. John Watson

Thorley Walters

Major John Sholto

Michael O'Hagan

Mordecai Smith

Cherie Lunghi

Mary Morstan

The Sign of Four

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Cast

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