Addison visits Seattle Grace because they need skills that only she has. Rebecca/Ava returns with news for Alex. Meredith and Derek’s clinical trial experiences one or two developments.
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Episode Details: Grey’s Anatomy Season 4 Episode 13
| Title | Piece of My Heart |
| Episode | 13 |
| Season | 4 |
| Release | May 1, 2008 |
| Overview | Addison visits Seattle Grace because they need skills that only she has. Rebecca/Ava returns with news for Alex. Meredith and Derek's clinical trial experiences one or two developments. |
| Rating | 7.4 |
| Vote Count | 9 |
