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Grey's Anatomy

Preview Clip of Season 9, Episode 12 Sneak Peek: Derek vs. Dr. Cahill (VIDEO)

Grey's Anatomy Season 9, Episode 12: "Walking on a Dream" (January 24) is going to introduce a new face to the hospital: Dr. Cahill (Constance Zimmer). She's here to make things run more efficiently, and the docs are not a fan.