Shortly after the death of renowned socialist theorist Karl Marx, the trustee of his estate, Friedrich Engels, approaches Sherlock Holmes for help. As the mourners arrive in London for Marx’s funeral, a mystery unfolds that culminates in a showdown at Highgate Cemetery.

The main attraction of an upcoming exhibition on ancient Egypt vanishes shortly before opening night at the British Museum. The pharaoh sarcophagus, which would normally contain an ancient mummy, is empty. At the request of the distraught museum director, Holmes and Watson take up the case.

Sherlock Holmes is called to the London Zoo to investigate the treacherous murder of an unusual victim. While Scotland Yard ascribes little significance to the case, Holmes believes he has uncovered a politically motivated assassination.

A treacherous murder rattles the Japanese embassy in London. The in-house secret service agent turns to Sherlock Holmes for help in quickly solving the case before it provokes a diplomatic crisis.

Holmes is faced with a moral dilemma when his latest client turns out to be a former pirate captain who had been robbed of his bounty nearly two decades ago. Can Holmes help him recover his share of the treasure from his former shipmates?

A treacherous murder rattles the Japanese embassy in London. The in-house secret service agent turns to Sherlock Holmes for help in quickly solving the case before it provokes a diplomatic crisis.

Sherlock Holmes is handed a blackmail case shortly before Christmas. Usurer Jacob Marley must pay 10,000 pounds if he wishes to avoid any damages. Holmes and Watson get to work on the investigation.

Sherlock Holmes is called to the London Zoo to investigate the treacherous murder of an unusual victim. While Scotland Yard ascribes little significance to the case, Holmes believes he has uncovered a politically motivated assassination.

Holmes and Watson are spending their day off at the Kew Royal Botanic Gardens when the discovery of a dead body in the large Palm House requires their immediate attention. The park’s head of security enlists their help in hope of solving the case before the arrival of Scotland Yard.

Sherlock Holmes is handed a blackmail case shortly before Christmas. Usurer Jacob Marley must pay 10,000 pounds if he wishes to avoid any damages. Holmes and Watson get to work on the investigation.

The elderly owner of a Scottish whisky distillery receives an anonymous death threat by mail. Holmes and Watson travel to the Highlands to get to the bottom of it and put an end to this dangerous game.

Holmes and Watson are spending their day off at the Kew Royal Botanic Gardens when the discovery of a dead body in the large Palm House requires their immediate attention. The park’s head of security enlists their help in hope of solving the case before the arrival of Scotland Yard.