The Sign of Four (1987) is a Crime, Mystery, Thriller film that follows mary Morstan has received a pearl in the post every year since her father's disappearance. This leads Holmes and Watson to the truth about a secret pact between four convicts during the Indian Rebellion of 1857. The Sign of Four is not currently listed with streaming providers in your selected region, but availability can change over time. It has a user rating of 7.4 out of 10 from 80 votes. Fans of crime movies may also want to explore similar titles below.