E.R. was one of the longest running shows ever. It wrapped up 15 years yesterday with its finale. End of 'ER' marks end of era - CNN.com So, what do you think about this? Was it about time? Is the idea worn out? What type of show would you like to see NBC replace ER with? Personally I think part of the reason they ended it was due to Michael Crichton dying recently. He was one of the show's writers and as far as I know he was still active in writing the series. I could be wrong though.