The Private Life of Sherlock Holmes is a 1970 film directed and produced by Billy Wilder he also shared writing credit with his longtime collaborator I. A. L. Diamond. It starred Robert Stephens as Sherlock Holmes and Colin Blakely as Dr. Watson. The film offers an affectionate, slightly parodic look at the man behind the public faade, and draws a distinction between the real Holmes and the character portrayed by Watson in his stories for The Strand magazine.
The film is divided into two separate, unequal stories. In the shorter of the two, Holmes is approached by a famous Russian ballerina, Madame Petrova Tamara Toumanova, who proposes that they conceive a child together, one who she hopes will inherit her physique and his intellect. Holmes manages to extricate himself by claiming that Watson is his lover, much to the doctors embarrassment.In the main plot, a Belgian woman, Gabrielle Valladon Genevive Page is fished out of the River Thames and brought to Baker Street. She begs Holmes to find her missing engineer husband. The resulting investigation leads to a castle in Scotland. Along the way, they encounter a group of monks and some midgets, and Watson apparently sights the Loch Ness monster. ........
Source: Wikipedia