4x13 Piece of My Heart
First Aired: May. 01, 2008 on ABC
Summary: Addison makes her return to Seattle Grace in order to perform an operation. As she does so, she is preoccupied by all of the changes in her former co-workers' lives. Meanwhile, Meredith and Derek's clinical trial has its first patient, and Rebecca returns to deliver Alex some shocking news.
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Guest Stars[no credits found]