The Hound of the Baskervilles

Sherlock Holmes (Peter Cushing) and Doctor Watson (André Morell) investigate the death of Sir Charles Baskerville, whose heir, Sir Henry Baskerville (Christopher Lee), has arrived at his newly inherited estate in southwest England after a rumored curse from the time of the English Civil War. A mysterious threat involving a tarantula convinces Holmes that Sir Henry's life is in danger, and they follow leads to uncover the truth behind the family's history and the supposed supernatural entity threatening their lives.