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
ER (season 5) Chulack helmed 5 episodes and Kaplan directed 4. Cinematographer and co-producer Thorpe directed a further episode. Regular directors Lesli Linka Glatter, Félix Enríquez Alcalá, and Rod Holcomb all returned to direct further episodes. Other returning directors include executive producer John Wells, Christopher Misiano, David Nutter, and T.R. Babu Subramaniam. Cast member Laura Innes made her series directing debut with a fifth-season episode. Other new directors were Steve De Jarnatt and Dave Chameides, each with a single episode. <onlyinclude></onlyinclude> ER (season 5) The fifth season of the American fictional drama television series "ER" first aired on September 24, 1998 and concluded