Episode Part 1 Adaptation: The Hound of the Baskervilles Episode: 1 Airdate: 03 October 1982 IMDb: Part 1 (link not verified) Canon basis: The Hound of the Baskervilles Next: Part 2 Cast Tom Baker as Sherlock Holmes Terence Rigby as Dr. John H. Watson Morris Perry as Barrymore Gillian Martell as Mrs. Barrymore John Boswall as Sir Charles Baskerville Nicholas Woodeson as Sir Henry Baskerville Terry Forrestal as Sir Hugo Baskerville Will Knightley as Dr. James Mortimer Joanna Andrews as Girl