Alice Turner sends for Holmes when her lifelong friend farmer William McCarthy is killed and police suspicion falls on his son, James. James McCarthy admits quarrelling with his father, but he will not explain what their argument was about.
Sir Charles Baskerville is found dead on Dartmoor, with his face contorted in terror and the footprints of a huge dog near his body. On arrival in England, Sir Charles's American heir, now Sir Henry Baskerville, engages Holmes to come to Devon and get to the bottom of the age-old legend of the Hound of the Baskervilles - a phantom which kills.
From the outset, Holmes is convinced there is a human murderer at work and he lays a deep plan to foil him.
The body of one Cadogan West is found in an underground tunnel near Aldgate Station, with his skull smashed, and Holmes is puzzled by the interest his brother Mycroft is showing in the case. Mycroft explains that the top secret plans for a new submarine were in the dead man's pocket, but three of the ten pages were missing when the body was found. Mycroft, on behalf of the British Government, asks his brother to find the missing pages.
In a remote area of Dartmoor, Silver Blaze, Colonel Ross's famous and valuable racehorse, goes missing, and the dead body of John Straker, the colonel's trainer, is found nearby. The Police seem bewildered, but then they charge Fitzroy Stephen, a well-known figure in the racing world, with the murder. Holmes is called in to trace the missing horse and finds he has to separate fact from fiction. Who is the real villain?
For years after her father's disappearance, the beautiful Miss Mary Morstan receives anonymously every year one large and valuable pearl. When, finally, an invitation arrives to meet the mysterious pearl-giver, Mary Morstan seeks Holmes's advice, and he begins to unravel some remarkable clues, including a poison dart and a man with a wooden leg. What Holmes finds is an old soldier who is determined to punish those who betrayed him and his friends by stealing their oriental treasure.moreless
The British Prime Minister himself calls at Baker Street to seek Holmes's help with a political crisis. A highly confidential letter from a foreign power has been stolen from the Secretary of State for European Affairs, threatening the world with war. Minutes after the Prime Minister's departure, Holmes receives another visit, from a veiled lady.
In his investigation, a bloodstain is clearly an important clue, but whose is the blood? Holmes sees through the deceptions of great and small alike.
Three years on from Holmes's fatal fall into the Reichenbach Falls, Watson wrestles with a murder case under his own steam. But who is the enigmatic stranger in the Coroner's court, listening intently to all the evidence?
Holmes returns home and explains how he escaped death at Reichenbach, while Moriarty lost his life. Holmes and Watson must now bring a partner of Moriarty's to justice, by proving he is a murderer.
The French government sends for Holmes when the Mona Lisa is stolen from the Louvre. Holmes swiftly decides he is dealing with a mastermind - and none other than his old enemy Professor Moriarty himself.
Holmes foils Moriarty's plans to sell Leonardo da Vinci's masterpiece and trails him to Switzerland, where they meet and fight to the death above the famous waterfall at Reichenbach.
A notice in a newspaper seeks red-headed men, inviting them to join a league which will pay them well - and Jabez Wilson, a pawnbroker who responds, finds he is hired and paid generously for spending four hours a day copying an encyclopedia in long hand. When the league is suddenly dissolved, Holmes is asked to find out what has been going on, and he quickly suspects crime. Indeed, behind this curious arrangement lurks Holmes's arch-enemy, Professor Moriarty.moreless