The Sign of Four
- Ano: 1987
- País: United Kingdom
- Gênero: Cinema TV, Aventura, Crime, Mistério, Thriller
- Estúdio: Granada Television
- Palavra-chave: treasure, based on novel or book, river, doctor, sherlock holmes
- Diretor: Peter Hammond
- Fundida: Jeremy Brett, Edward Hardwicke, Jenny Seagrove, Ronald Lacey, John Thaw, Emrys James