Question: how many episodes of er was george clooney in

title: Doug Ross
text: Warner Bros. Television , the studio which produces ER for NBC , kept secret from NBC Dr. Ross ' cameo in `` Such Sweet Sorrow '' , which promoted the episode as Carol Hathaway 's goodbye , with no mention of Ross ' appearance . The original version of `` Such Sweet Sorrow '' that Warner Bros. sent to NBC ended after the scene where we see Hathaway on the plane to Seattle . At the eleventh hour , Warner Bros. messengered an `` edited '' version of the episode to NBC headquarters in New York for broadcast . NBC was miffed that it was kept in the dark as it could have generated valuable ad revenue if it had aired promos that the episode marked the return of George Clooney . Clooney cited the fans of the show for his reason for making the cameo ( he wanted Hathaway 's and Ross 's characters to get back together , which many fans hoped for ) . Clooney reportedly only asked to be paid scale for the cameo .