- HD 1080
- Runtime: 124m.
- Status: Released
- 2
- Languages: en
- Country: Canada, United Kingdom
- Director: Bob Clark
- Stars: Christopher Plummer, James Mason, David Hemmings, Susan Clark, Anthony Quayle
- keywords: jack the ripper, sherlock holmes
- Production_studio: Canadian Film Development Corporation, Famous Players, Highlight
- Slogan: The Jack the Ripper Murders. Sherlock Holmes lifts the veil of secrecy, corruption and terror at the heart of the throne of England itself. Clue by clue... Murder by murder...
- providers: fuboTV
- The Murder by Decree is featured in the top rankings of 1979
- #18 in Top Crime Movies of 1979
- #11 in Top Thriller Movies of 1979
- #7 in Top Mystery Movies of 1979
Sherlock Holmes is drawn into the case of Jack the Ripper, who is killing prostitutes in London's East End. Assisted by Dr. Watson, and using information provided by a renowned psychic, Robert Lees, Holmes finds that the murders may have their roots in a Royal indiscretion and that a cover-up is being managed by politicians at the highest level, all of whom happen to be Masons.