Season 7, Episode 3 Superfreak

First Aired: October 7, 2010

Derek's estranged sister, Amelia (Caterina Scorsone), visits---and brings with her the issues that led to their estrangement. Meanwhile, the chief notices that Alex hasn't been taking elevators since his shooting, and tries to help; and Meredith and Derek keep trying to ease Cristina back into surgery after her PTSD episode.

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