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Mitchell Haaseth/NBCU Photo Bank
12. After seasons of having Laura Innes walk with a fake hip, the writers had Dr. Weaver had to undergo hip surgery in season 11 because their star had developed back problems due to playing the character. "My real back was getting screwed up," she revealed. "I got a bone density test and the bottom of my spine is starting to curve on one side from ten years of raising my hip."
13. After fulfilling his five-year contract, Clooney, then a full-blown movie star, left the series under good terms, with Wells once saying the actor had "lost literally millions of dollars by staying on the show."