There's a new (old) face coming to Grey's Anatomy tonight. In the sneak preview below, Faye Dunaway makes her first appearance as a legendary surgeon at Seattle Grace - one whose recent decline has become the topic of debate among our favorite surgeons ...

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Tonight's episode concludes the Grey's Anatomy-Private Practice event, and a number of big story lines hang in the balance. Follow the link for three more sneak previews!

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.