100 Greatest TV Shows of All Time

From time-capsule sitcoms to cutting-edge Peak-TV dramas — the definitive ranking of the game-changing small-screen classics

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50. 'ER'

The hospital drama to put all others on the DNR list, ER blew up in the early Nineties, making stars out of Julianna Margulies and the previously obscure George Clooney, until then best known as the big-hair hunk teacher from The Facts of Life. But the real surprise was how ER kept thriving, replacing all its original stars yet remaining itself for 15 years, with hour after hour of life, death and romance amid the scrubs. 

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