The Return of Sherlock Holmes is a 1987 American made-for-television mystery film and pilot created, written and produced by Bob Shayne involving the famous detective Sherlock Holmes finding himself in the modern world. It originally premiered January 10, 1987 on CBS.

The Sign of the Four (1890), also called The Sign of Four, is the second novel featuring Sherlock Holmes by British writer Sir Arthur Conan Doyle. Doyle wrote four novels and 56 short stories featuring the fictional detective.