Dudley Moore

Doctor Watson / Mr. Spiggot / Mrs. Ada Holmes / Piano Player

Peter Cook

Sherlock Holmes

Denholm Elliott

Stapleton

Joan Greenwood

Beryl Stapleton

Hugh Griffith

Frankland

Irene Handl

Mrs. Barrymore

Terry-Thomas

Dr. Mortimer

Max Wall

Arthur Barrymore

Kenneth Williams

Sir Henry Baskerville

Roy Kinnear

Selden the Axe Murderer

Dana Gillespie

Mary Frankland

Lucy Griffiths

Iris

Prunella Scales

Glynis

Ava Cadell

Marsha

Jessie Matthews

Mrs. Tinsdale

Paul Morrissey