The brief return of George Clooney to ER has given the long-running medical drama its best rating in two years, as the series draws to a close.
Clooney's comeback episode, also featuring former regulars Noah Wyle and Eriq La Salle, saw a 23 per cent increase in viewers, reports the BBC.
The show, which is based on an emergency room of a fictional Chicago hospital, was the most popular show on television in 1995, averaging 32 million viewers a week.
Clooney gained fame for playing Dr. Doug Ross, firmly cementing a place amongst Hollywood heartthrobs. He left in 1999 to pursue a full time career on the silver screen, winning an Oscar in 2005. The show in its 15th, and final series was created by the late Jurassic Park author Michael Crichton.