So You Not Gone Tell Nobody? Surprising Actor Replacements That Were Snuck In On Us

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ER’s Entire Cast

ER made it into character switch history by shaking up pretty much the entire cast. First George Clooney left and when things didn’t fall apart, they got bolder with the character changes. George was followed by almost the entire cast who left one by one. At the end of the show’s 15-year run, the cast was almost entirely different.

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