Episode The Hound of the Baskervilles Adaptation: Early Rathbone films Episode: 1 Airdate: 31 March 1939 IMDb: The Hound of the Baskervilles Letterboxd: The Hound of the Baskervilles Canon basis: The Hound of the Baskervilles Next: The Adventures of Sherlock Holmes Cast Basil Rathbone as Sherlock Holmes Nigel Bruce as Dr. John H. Watson John Carradine as Barryman Eily Malyon as Mrs. Barryman Ian Maclaren as Sir Charles Baskerville Richard Greene as Sir Henry Baskerville Ralph Forbes as Sir Hugo Baskerville Barlowe Borland as Frankland Mary Gordon as Mrs. Hudson Lionel Atwill as Dr. James Mortimer Beryl Mercer as Mrs. Jennifer Mortimer Wendy Barrie as Beryl Stapleton Morton Lowry as Jack Stapleton Ruth Terry as Betsy Ann E.E. Clive as Cabbie Rita Page as Chambermaid Nigel De Brulier as Convict Lionel Pape as Coroner David Thursby as Open Carriage Driver Jack Egger as Man Mary Young as Betsy Ann's Mother Kenneth Hunter as Ship's Officer John Graham Spacey as Ship's Porter Peter Willes as Roderick Leonard Carey as Hugo's Servant Vesey O'Davoren as Ship's Steward