ER was a medical drama that aired on NBC for 15 seasons. Created by historic author Michael Crichton (Jurassic Park), ER follows the daily happenings of the doctors, nurses, and interns at Chicago's County General. The staff have included Dr. Mark Greene (Anthony Edwards), Dr. Doug Ross (George Clooney) and countless others including Dr. Archie Morris (Scott Grimes) and Dr. Tony Gates (John Stamos). The series used a revolving door of cast members a la Law & Order.
Throughout the fifteen seasons there have been numerous challenging cases in the ER that involved helicopters crashing, doctors being beaten up inside the hospital, and the personal dealings with the doctors, nurses, and families inside County General. Numerous doctors have fallen victim to death inside the ER as well as family members and many other personal tragedies.
ER has launched the careers of actors George Clooney, Noah Wyle, Anthony Edwards, Gloria Reuben, Jorja Fox, Eriq La Salle, William H. Macy and countless others, and wraps up its final season with the returns of many of the show's former cast.