The Seven-Per-Cent Solution

To treat his friend's cocaine induced delusions, Watson lures Sherlock Holmes to Sigmund Freud.
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 attempts to solve the mysteries of Holmes' subconscious, while Holmes devotes himself to solving a mystery involving the kidnapping of Lola Deveraux.