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.
Say What You Feel — Katalyst & Stephanie McKay
plays at the beginning of the episode as Addison is greeted by Bailey and the Chief
When Derek's new clinical trial team is taking the bear cub brain tumor patient to surgery; song continues thru Addison's c-section fetal heart patient surgery for which she came to Seattle for.
Song starts with Meredith telling Derek it was a pleasure to work with him. Then to Chief talking to Addison about coming back. She says she had to come back to know that leaving was the right thing.
Callie is awkward with Hahn, then dances w/Mark. Hahn tells Cristina off in front of Addie. Addie tells Mere not to let go of Derek. Izzie finds out Rebecca isn't pregnant. Alex & Rebecca are together