Television show - TV Show - Yahoo! TV Code Awesome: George Clooney Scrubbing Into ER By Natalie Finn Wed Jan 21, 4:06 PM PST ER paged Dr. Rossand he answered. Sources tell E! News that George Clooney will be shooting scenes this week for an upcoming episode of the hit medical series, which is in its 15th and final season on NBC. The network recently ordered up another three episodes of its stalwart Thursday-night drama, raising hopes that nabbing Clooney for a guest spot was one of the reasons for the extension. Aw, George. Is there any humanitarian cause he won't support? The Oscar winner last appeared on ER for an uncredited minute in 2000, a year after taking off to make movies fulltime, to help tie up the storyline for Julianna Margulies' departing character, Nurse Carol Hathaway, who had twin daughters with Clooney's Dr. Doug Ross. Whether or not Clooney would pop up one last time has been up in the air for months, despite Noah Wyle's past assurance that his former costar would return, "schedule permitting." The Michael Clayton star's publicist didn't immediately respond to a request for comment. An ER rep would not confirm other reports that Clooney would be shooting his scenes Thursday and Friday. ER's series finale airs April 2 on NBC.