Holmes and Watson examine a visitor's walking stick and deduce the identity and character of its unknown owner.

Dr. Mortimer reads aloud an ancient manuscript describing Hugo Baskerville's gruesome death at the jaws of a monstrous hound.

Dr. Mortimer tells Holmes that Sir Charles Baskerville was found dead in terror, with giant paw prints near his body.

Sir Henry Baskerville arrives in London and shows Holmes a threatening cut-out note warning him to avoid the moor.

Holmes and Watson follow Sir Henry through London and spot a bearded man watching him from a horse-drawn cab.

Watson, Sir Henry, and Dr. Mortimer travel to Devonshire and arrive at the gloomy, ancient Baskerville Hall.

A woman Watson meets on the moor urgently warns him to leave the area and persuade Sir Henry to flee.

Watson and Sir Henry catch Barrymore secretly signaling with a candle at an upstairs window toward the dark moor.

Mrs. Barrymore confesses that her brother, escaped murderer Selden, is hiding on the moor and the Barrymores have been feeding him.

Barrymore reveals a partially burned letter signed 'LL' that was found in the late Sir Charles's fireplace.

Watson enters an ancient stone hut on the moorland and discovers that Holmes has been secretly living there all along.

Holmes tells Watson that Beryl is not Stapleton's sister but his wife, and names Stapleton as the prime murder suspect.

A gigantic glowing hound bursts from the fog and attacks Sir Henry as Holmes, Watson, and Lestrade watch in horror.

Holmes shoots the hound dead before it can kill Sir Henry, finally destroying the legendary beast of the Baskervilles.

Holmes reveals that Stapleton is Rodger Baskerville, whose goal was to eliminate all heirs and seize the Baskerville estate.

Holmes and Watson are drawn into the case when Dr. Mortimer describes the ancient hound legend and the suspicious death of Sir Charles Baskerville. Sir Henry Baskerville arrives in London to claim the estate and is immediately threatened by a cut-out warning note and a shadowy spy. Watson accompanies Sir Henry to Baskerville Hall, where the eerie moors and suspicious servants keep him on constant guard. The discovery of Barrymore's secret signaling and a partially burned letter begin to unravel the conspiracy. Holmes, revealed to be secretly hiding on the moor, identifies Stapleton as the killer and sets a trap using Sir Henry as bait. The monstrous hound is finally shot dead, and Holmes exposes Stapleton as a Baskerville heir who used the ancient legend to engineer murder.

The core mystery of the Baskerville curse.

Dr. Mortimer arrives at Sherlock Holmes's Baker Street flat to seek advice about a mysterious death at Baskerville Hall.

Holmes spends an evening studying a large map of the Dartmoor region, working out his initial theory of the case.

Sir Henry reports that one of his new boots vanished from outside his hotel room door overnight.

Holmes hires the delivery boy Cartwright to search London hotel wastepaper baskets for a cut-up copy of The Times.

A cab driver visits Holmes's flat and reveals the mysterious bearded spy gave Holmes's own name to him as a taunt.

Watson lies awake at Baskerville Hall and hears an unknown woman weeping somewhere in the darkened mansion.

Stapleton guides Watson along the edge of the deadly Grimpen Mire and warns him never to attempt a crossing alone.

Watson and Stapleton hear a deep, mournful moaning sound rising from the moor, which some locals blame on the ghostly hound.

Beryl runs along a shortcut to intercept Watson on the path and asks him to ignore the warning she gave him earlier.

Sir Henry and Watson chase Selden across the wet moor through rain and darkness but fail to capture him.

Watson glimpses a tall, mysterious figure silhouetted against the rising moon on a hilltop tor while searching for Selden.

Watson visits Laura Lyons alone and learns she planned to ask Sir Charles for divorce funds but never kept the appointment.

Frankland is goaded into pointing out where a young boy has been delivering food to someone hidden on the moorland crags.

Holmes and Watson find Selden dead at the base of a cliff, wearing clothes that Sir Henry had donated to Barrymore.

Sir Henry and Dr. Mortimer visit Holmes and Watson in London before setting off on a round-the-world recovery voyage.

Mortimer's visit to Baker Street sets the investigation in motion, and Holmes quickly begins gathering clues from a missing boot to a scheming spy in a cab. Watson travels to Dartmoor, where the gloomy Hall and its secretive inhabitants slowly reveal their hidden stories. Stapleton introduces Watson to the deadly Grimpen Mire and the eerie moorland sounds that give the region its supernatural reputation. The pursuit of the escaped convict Selden leads Watson deeper into the moor, where he glimpses a mysterious silhouetted figure who will later prove to be Holmes himself. Watson's solo interview with Laura Lyons and Frankland's accidental disclosure begin to close in on the true nature of the conspiracy. The discovery of Selden's body at the base of a cliff proves the hound is real and deadly, and the story ends with Sir Henry departing on a voyage to recover from his ordeal.

The clues, the countryside, and the suspects.

Dr. Mortimer admits to Holmes that he discovered giant hound footprints near Sir Charles's body but kept silent out of fear.

Holmes analyzes the cut-out warning note and deduces it was trimmed with small nail scissors by someone working in a hurry.

Holmes and Dr. Mortimer arrange a telegram to Barrymore to confirm whether the butler is actually present at Baskerville Hall.

Watson confronts Mrs. Barrymore in the morning and sees her tear-swollen eyes, proving that Barrymore lied about her sobbing.

Stapleton furiously interrupts Sir Henry's romantic walk with Beryl on the moor and accuses the baronet of dishonorable intentions.

Stapleton visits Baskerville Hall to apologize for his outburst and gives Sir Henry permission to court Beryl after three months.

Sir Henry agrees to let the convicted Selden escape to South America rather than have him reported to the police.

Watson learns from Dr. Mortimer that the initials LL belong to Laura Lyons, the estranged daughter of the litigious Frankland.

Holmes studies the ancestral portrait of Hugo Baskerville on the hall wall and recognizes a striking facial resemblance to Stapleton.

Holmes visits Laura Lyons in her office and reveals that Stapleton is already married to Beryl and never intended to wed her.

Laura Lyons reveals that Stapleton dictated the letter she wrote, which was used to lure Sir Charles to his death.

Inspector Lestrade arrives from London at the local train station to assist Holmes with the final trap against Stapleton.

Watson peers through Merripit House windows and watches Stapleton slip outside to unlock a small outbuilding hiding the hound.

Holmes and Watson break into Stapleton's locked room and find Beryl tied to a beam, beaten and barely conscious.

Holmes explains that the hound's terrifying glowing appearance was created by phosphorus paint applied to the dog's head and muzzle.

The case turns on a series of key revelations, beginning with Mortimer's admission about the paw prints and Holmes's sharp analysis of the cut-out warning note. Early deceptions — Barrymore's lie about his wife and Stapleton's staged rage followed by a calculated apology — gradually crumble under Watson's persistent observation. Sir Henry's decision to let Selden escape leads directly to Barrymore's disclosure, and Watson's investigation soon connects the initials LL to the true murder plot. Holmes's recognition of Stapleton's likeness to the ancestral portrait locks in the motive, and his brutal confrontation of Laura Lyons destroys Stapleton's final alibi. With Lestrade in place, the trap is sprung — the hound is killed, Beryl is found bound and beaten, and the terrifying secret of the glowing beast is finally explained.