Sherlock Holmes finds himself evenly matched when he is employed by the King of Bohemia to retrieve an indiscreet photograph from the American actress and singer, Irene Adler.

A gentleman is baffled when the childish drawings of little dancing men terrify his American wife. Sherlock Holmes soon discovers why.

An unknown thief steals an important naval treaty from a Foreign Office clerk; Sherlock Holmes sets out to find it.

A strange man on a bicycle follows a young music teacher as she bicycles on a lonely road to and from the city.

Col. Barclay is found dead and his wife is arrested for the murder, but Holmes is convinced a missing door key will reveal the true killer.

A young woman asks for Holmes' help when her ill-tempered stepfather moves her into the same room where her sister died under mysterious circumstances.

When the Countess of Morcar's priceless blue carbuncle is stolen, a reformed thief is charged with the crime.

Violet Hunter has been offered the role of governess at an estate in Hampshire but the employer insists that for the role she will be obliged to cut her hair short. Her perturbation at this causes her to seek Sherlock Holmes's advice.

An unsavory gang kidnaps a Greek interpreter and forces him to relate their demands to an abductee who knows only the Greek tongue.

When a notorious retired builder is found dead, his recently-named heir is the prime suspect.

Sherlock Holmes is contacted by Dr Trevelyan whose medical practice was set up and paid for by Mr Blessington who lives on the premises. Of late Mr Blessington has had spells of intense anxiety. Dr Trevelyan fears for his health and life.

What seems at first to be a harmless prank played upon a red-headed man is soon revealed to be much more: a sinister scheme devised by the Napoleon of Crime.

Holmes and Watson travel to Europe to escape Moriarty's vengeance.