The Hound of the Baskervilles

Dr. Mortimer brings the Baskerville manuscript and the problem of Sir Charles' death to Baker Street. Holmes deduces details about Mortimer's dog and walking stick, then hears the legend of the Baskerville hound.

Sir Henry Baskerville arrives in London, receives a threatening note made from newspaper cuttings, and discovers someone has stolen his boot. Holmes detects a bearded man following them in a cab. Holmes decides to send Watson to Devonshire as his agent.

Watson and Sir Henry arrive at Baskerville Hall. The moor is introduced as a landscape of fog, bogs, and prehistoric ruins. The Barrymores behave suspiciously. Watson discovers they are signaling Selden, the escaped convict. Stapleton introduces himself as a friendly naturalist, but reacts violently when Sir Henry courts Beryl.

Watson sends detailed reports to Holmes. He investigates Laura Lyons and discovers she was lured into arranging a meeting with Sir Charles on the night of his death. The hound is heard howling on the moor. Watson spots a mysterious figure silhouetted against the moon on the tor.

Watson tracks the mysterious figure to a stone hut on the tor and discovers Holmes, who has been secretly investigating on the moor for weeks. Holmes reveals his deductions: Stapleton is a Baskerville heir. Selden is killed by the hound, mistaken for Sir Henry because he wears Sir Henry's old clothes.

Holmes and Watson dine with Stapleton and confirm his Baskerville resemblance. Sir Henry walks home alone across the moor. The phosphorescent hound attacks. Holmes and Watson shoot it. Stapleton flees into the Grimpen Mire.

Back in Baker Street, Holmes explains the complete chain of deduction, connecting every clue. Laura Lyons confirms Stapleton's manipulation. Sir Henry recovers. The case file is closed.

The wider implications settle. Beryl Stapleton is freed but psychologically damaged. The Baskerville inheritance passes cleanly. Holmes reflects on the limits of his method.