Adaptations of Sherlock Holmes in five British films from 1931 to 1937. Basil Rathbone and Nigel Bruce played Holmes and Watson in "The Hound of the Baskervilles" which launched a 14-film series. Rathbone is regarded as the Holmes of his generation. Many other films have been comedies and parodies that poke fun at Holmes, Watson, their relationship and other characters. These have included Billy Wilder's "The Private Life of Sherlock Holmes" with Robert Stephens and Colin Blakely as Holmes and Watson. More serious, non-canonical films were "A Study in Terror" (with John Neville and Donald Houston) and "Murder by Decree" (with Christopher Plummer and
Sherlock Holmes novel "Psmith, Journalist" (neither spoken by Holmes). The exact phrase "Elementary, my dear Watson" is used by protagonist Tom Beresford in Agatha Christie's 1922 novel "The Secret Adversary". It also appears at the end of the 1929 film "The Return of Sherlock Holmes", the first Holmes sound film. The phrase became familiar with the American public in part due to its use in The Rathbone-Bruce series of films from 1939 to 1946. Conan Doyle's 56 short stories and four novels are known as the "canon" by Holmes aficionados. Early canonical scholars included Ronald Knox in Britain and Christopher Morley in