The Sign of Four
- Ano: 1987
- País: United Kingdom
- Xénero: TV Movie, Adventure, Crime, Mystery, Thriller
- Estudo: Granada Television
- Palabra clave: treasure, based on novel or book, river, doctor, sherlock holmes
- Director: Peter Hammond
- Reparto: Jeremy Brett, Edward Hardwicke, Jenny Seagrove, Ronald Lacey, John Thaw, Emrys James