Sir Henry Baskerville
Sherlock Holmes
Beryl Stapleton
Doctor John H. Watson
Dr. James Mortimer
Barryman
Frankland
Mrs. Jennifer Mortimer
John 'Jack' Stapleton
Sir Hugo Baskerville
London Cabbie John Clayton
Mrs. Barryman
The Coroner
The Notting Hill Murderer
Mrs. Hudson
Sir Charles Baskerville
Betsy Ann
Betsy Ann's Mother (uncredited)
Ship's Officer (uncredited)
Ship's Steward (uncredited)
Ship's Porter (uncredited)
Open Carriage Driver (uncredited)
Roderick
Hugo's Servant (uncredited)
