Who wrote the Sherlock episode The Hounds of Baskerville?

Mark Gatiss wrote the Sherlock episode “The Hounds of Baskerville.”

Gatiss also co-created Sherlock with Steven Moffat and played Mycroft Holmes, Sherlock’s brother. His script modernised Arthur Conan Doyle’s 1902 novel The Hound of the Baskervilles, moving the mystery into a contemporary military-science setting while retaining the isolated moorland, terrifying hound and traumatised witness.

The episode follows Henry Knight, who believes a gigantic hound killed his father on Dartmoor. Sherlock and John investigate the nearby Baskerville facility and uncover the H.O.U.N.D. project, involving a hallucinogenic chemical weapon. The apparent supernatural beast is therefore connected to science, fear and manipulated perception rather than a literal demon.

A common mix-up is confusing the writer with the director: Paul McGuigan directed the episode, while Gatiss wrote it. Gatiss also wrote other Sherlock episodes, including “The Great Game” and “The Empty Hearse.”