From ABC: "A devastated Cristina presses Owen to confess the intimate details of his affair; Mark takes his new authority very seriously when he steps in as chief for the day and butts heads with Richard over a patient‘s liver transplant; and Callie deems Meredith ready for the boards, while the rest of the residents continue to stress about the exam. Meanwhile, Callie, Arizona and Bailey plan a much needed ladies night for Teddy."

Eric Dane is going to be a huge comedy star when Grey‘s Anatomy is over. Mark Sloan has become one of the funniest characters on TV, and this week he takes over as Chief for a Day with hilarious results. The actual chief, Owen Hunt, picks up the emotional slack as he and Cristina spend the entire episode locked in their apartment while she forces him to tell her all about his affair.
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