Upstairs, Downstairs is a British television drama series created by Jean Marsh and Eileen Atkins, and developed by Alfred Shaughnessy for London Weekend Television. The series consists of 68 hour-long episodes that aired in the United Kingdom on ITV from 1971 to 1975, in Ireland on RTÉ from 1972 to 1976 and in the United States as part of Masterpiece Theatre on PBS from 1974 to 1977. It was eventually broadcast in over 70 countries to an audience of over one billion viewers.