Concerned about his friend's cocaine use, Dr. Watson tricks Sherlock Holmes into travelling to Vienna, where Holmes enters the care of Sigmund Freud. Freud attemts to solve the mysteries of Holmes' subconscious, while Holmes devotes himself to solving a mystery involving the kidnapping of Lola Deveraux.

While the book showed Dr. Sigmund Freud with a daughter, the child he had in real life, the movie showed him with a make-believe son because Dr. Anna Freud threatened a lawsuit if she was included. Since her father was dead she had no control over how he was portrayed.

Professor Moriarty:
Doctor Watson, Mr. Holmes is convinced that I am some sort of criminal mastermind of the most depraved order. I know he is a great and good man. All England resounds with his praise. But in my case he fosters a ghastly illusion and I come to you as his friend rather than turning the matter over to my solicitor.

Continuity: When Holmes, Watson and Freud are attacked by rampaging horses, the trainer can be seen running behind the horses in long shots.

Written by Stephen Sondheim
Performed by Régine