Grey's Anatomy: Piece of My Heart

Episode 13 | Season 4 2007 - 2008 | First Aired: 5/01/2008

Synopsis:

Addison returns to Seattle Grace to perform an operation and is taken aback by all of the changes in her old co-workers' lives. Meredith and Derek's clinical trial has its first patient. Rebecca/Ava returns with shocking news for Alex - she's pregnant. Callie worries that Erica might be a lesbian and might be interested in her.

Mark Tinker

Director

Meredith Grey

George O'Malley

Dr. Mark Sloan

Miranda Bailey

Dr. Derek Shepherd