BURBANK, Calif. -- Fifteen years after "ER," the pioneering career-launching medical drama, first debuted, the show that spawned infinite others in the same genre is finally signing off tonight from NBC.
In tonight's finale, Noah Wyle returns along with many "ER" alums. Alexis Bledel ("Gilmore Girls") and Ernest Borgnine also guest star.
Inside, a look back at the classic series.
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