E.R. S14 - Created by novelist Michael Crichton and reportedly based on his own experiences as a medical student, the NBC hospital drama ER debuted September 19, 1994, directly opposite the similar CBS endeavor Chicago Hope. Though many critics thought that Chicago Hope had a better chance for survival than ER, the NBC series scored a surprise hit -- and over a decade later it was still firmly imbedded in the network's Thursday-night schedule, while Chicago Hope had long since vanished. Set largely in the emergency room of Chicago's fictional County General Hospital, ER focused on the professional and personal trials and tribulations of the unit's staff, with several subplots and story arcs weaving in and out of each hour-long episode. The regular cast for the first season consisted of Anthony Edwards as Dr. Mark Greene, George Clooney as Dr. Doug Ross, Sherry Stringfield as Dr. Susan Lewis, Eriq La Salle as Dr. Peter Benton, Julianna Margulies as Head Nurse Carol Hathaway, and Noah Wyle as med student (and later doctor) John Carter. Of these actors, only Sherry Stringfield and Noah Wyle would still be on the series as it entered its second decade on the air -- and of these two, only Wyle had been on the show throughout its entire run (Stringfield retired from the series in season three, but returned five years later).