​From Wikipedia, the free encyclopedia Stephen Lewis (born Stephen Cato 14 November 1936, London) is an English actor. He is best known for his roles as Inspector Cyril "Blakey" Blake in the LWT Sitcom On the Buses, Clem "Smiler" Hemmingway in the longest running sitcom Last of the Summer Wine and Harry Lambert in BBC Television's Oh, Doctor Beeching!. Description above from the Wikipedia article Stephen Lewis (actor), licensed under CC-BY-SA, full list of contributors on Wikipedia.