Curiosidades

Sir Arthur Conan Doyle never wrote a story in which Sherlock, a fictional character, worked on the real-life Jack the Ripper case. However, Dr. Joseph Bell, the real-life inspiration for Holmes, was consulted by Scotland Yard on the case.

The closing Baker Street sequence alluded to Sir Arthur Conan Doyle's 1892 short story "The Adventure of the Blue Carbuncle".

Frank Finlay also played Inspector Lestrade in Assassinato Por Decreto (1979), another film that pits Sherlock Holmes against Jack the Ripper. Anthony Quayle appeared in both films as well, in different roles.

Robert Stephens was the original choice to play Sherlock Holmes. He later played the role in A Vida Íntima de Sherlock Holmes (1970).

The film was known for being graphically violent for the time. However, the killing of the Ripper's final victim had to be toned down. As depicted in the film, Mary Kelly was the Ripper's only victim to be killed indoors where he had time to do his work. Kelly was literally butchered. Horrifying photographs of her mutilated corpse still exist.