Shannen Doherty

Let's start with the twofer! Not only did Ms. Doherty get too big for her britches on "Beverly Hills, 90210," but she managed afterward to mend fences with Aaron Spelling, only to tick him off a second time, on the equally long-running "Charmed." Doherty came the closest to Sheen's offscreen antics, with the booze-soaked nightclub incidents and marriages that lasted about as long as said incidents, etc. Sheen thinking he was irreplaceable made sense, though. "90210," however, was pure ensemble. And as for "Charmed," the choice was you or Alyssa Milano, and you thought you'd win?

Bing: More about Shannen Doherty | 'Charmed'

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(Warner Bros.)