The Hound of the Baskervilles
When Sir Charles Baskerville dies under mysterious circumstances on the Dartmoor estate, apparently from a heart attack induced by terror, Dr. Mortimer travels to London to consult Sherlock Holmes, fearing the ancient family curse of a gigantic, spectral hound. Holmes sends Dr. Watson to Baskerville Hall with the new heir, Sir Henry Baskerville, while he secretly conducts his own investigations on the desolate moors. Watson encounters a host of suspicious characters including the elusive naturalist Jack Stapleton and his beautiful sister Beryl, the gloomy butler Barrymore and his wife, and an escaped convict lurking on the moor. Eventually, Holmes reveals he has been in hiding nearby, gathering evidence, and deduces that Stapleton is a forgotten Baskerville heir attempting to murder Sir Henry to claim the fortune. Stapleton has been using a terrifying, phosphorescent-painted Great Dane to frighten his victims to death. In a final confrontation, Holmes and Watson intervene as Stapleton unleashes the hound on Sir Henry, shooting the beast, and Stapleton, while fleeing, perishes in the treacherous Grimpen Mire, thus ending the curse on the Baskervilles.