Cast of Murder by Decree

Christopher Plummer plays the iconic detective Sherlock Holmes, known for his sharp intellect and deductive reasoning.

James Mason portrays Dr. John H. Watson, Sherlock Holmes' loyal companion and friend.

David Hemmings takes on the role of Inspector Foxborough, a diligent investigator involved in solving the Jack the Ripper case.

Susan Clark embodies the character of Mary Kelly, a victim of Jack the Ripper and a key figure in the mystery.

Anthony Quayle is Sir Charles Warren, a historical figure and the Commissioner of the Metropolitan Police during the Jack the Ripper murders.

John Gielgud plays the role of Prime Minister Lord Salisbury, a prominent political figure in the investigation of the Jack the Ripper case.

Frank Finlay portrays Inspector Lestrade, a character often seen alongside Sherlock Holmes in various adaptations.

Donald Sutherland is Robert Lees, a historical figure and an important witness in the Jack the Ripper case.

Geneviève Bujold takes on the role of Annie Crook, a character central to the Jack the Ripper mystery.

Chris Wiggins is Doctor Hardy, a character involved in the medical aspects of the Jack the Ripper investigation.

Tedde Moore portrays Mrs. Lees, a character linked to key events in the Jack the Ripper case.

Peter Jonfield plays William Slade, a character connected to the unfolding events related to the Jack the Ripper murders.