Cast of ER Cast of ER "ER" is an American drama series that aired on NBC from September 19, 1994 until April 2, 2009. The series featured a large ensemble cast that changed dramatically over its long run. The main cast was augmented by a wealth of recurring characters and award-winning guest stars. The original starring cast consisted of Anthony Edwards as Dr. Mark Greene, George Clooney as Dr. Douglas "Doug" Ross, Sherry Stringfield as Dr. Susan Lewis, Noah Wyle as medical student (later Dr.) John Carter, and Eriq La Salle as Dr. Peter Benton. Julianna Margulies guest starred in the pilot as
Oxford "-er" "Stiff Upper Lip, Jeeves" (1963), a novel of P. G. Wodehouse (1881–1975), Bertie Wooster was asked whether he was fond of rugger, to which he replied "I don't think I know him". As late as 1972 the retired headmaster of a Hertfordshire grammar school recalled "the footer" (by which he meant rugby) having had a poor season in 1953–4. Typically such words are formed by abbreviating or altering the original word and adding "-er". Words to which "-er" is simply suffixed to provide a word with a "different", though related, meaning – such as "Peeler" (early Metropolitan policeman, after Sir