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Part 1 of 2, Season 6 finale. Meredith has news for Derek, but tells Cristina first. Then, the husband of patient (Michael O'Neill) who died during surgery arrives at the hospital with a gun and looking for Derek. Mary: Mandy Moore.
Conclusion, Season 6 finale. Shooter Gary Clark (Michael O'Neill) remains on the loose, presenting Cristina and Meredith with major surgical challenges. Meanwhile, Bailey and Mary (Mandy Moore) must find a way to get the injured Charles to an ER.
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They are adorable!