Paul Morrissey Director Peter Cook Sherlock Holmes Actor Dudley Moore Doctor Watson, Mrs. Ada Holmes, Mr. Spiggot, Piano Player Actor Denholm Elliott Stapleton Actor Joan Greenwood Beryl Stapleton Actor Terry-Thomas Dr. Mortimer Actor Max Wall Arthur Barrymore Actor Irene Handl Mrs. Barrymore Actor Kenneth Williams Sir Henry Baskerville Actor Hugh Griffith Frankland Actor Roy Kinnear Selden the Axe Murderer Actor Prunella Scales Glynis Actor Penelope Keith Massage Receptionist Actor Spike Milligan Policeman Actor John Goldstone Producer