Stephen Lewis is an English actor, comedian, director, screenwriter and playwright. In his early stage career he used the name Cato but after writing 'Sparrers Can't Sing' he was urged by his agent to use his real name. 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!. ... more on Wikipedia