Charlotte Gainsbourg, "Trick Pony"
Derek catches Mark having sex with a pharmaceutical rep. Cristina encourages Owen to become friends with Teddy. Charles meets them. A paramedic tips over a patient on a gurney.

Quadron, "Slippin'"
Charles helps Owen and Cristina with motocross patient. Arizona invites Teddy to a girl's night. Derek scolds Mark. Richard arrives. Cristina embarrasses herself in front of Jackson's patient/grandfather.

Ali Harter, "You Can Keep 'Em"
Derek agrees to let Richard operate while Harper is awake. Callie scolds Mark for sleeping with a nurse. Mark yells at Alex. Derek joins Callie in scolding Mark. Mark will help out on Callie's case. Mer and Jackson watch as Harper gives Richard operating instructions.

James Vincent McMorrow, "From The Woods!!"
Teddy, Arizona, Cristina, and Lexie present the lungs idea to Elliot and Jill. Elliot agrees to the procedure. Mark yells at Alex. Callie gives Mark a pep talk. Charles and Alex beg Jackson to introduce them to Harper. Jackson and Mer bond.

The Sweet Serenades, "Die Young"
Mark sympathizes with Kathy. Pam's ears work. Teddy is angry with Cristina and Lexie. They race to install the lungs. Jackson and Jill share a look. Richard, Bailey, and Mer realize that Harper was allergic to chromic sutures. Teddy, Cristina, and Lexie test the new lungs.

Lexie and Alex discuss their relationship. Arizona confirms her plans with Teddy. Teddy rejects Owen's plans. Mark apologizes to Alex, realizing Alex just slept with Lexie. Harper encourages Richard. Jackson introduces the doctors to Harper.

Harper encourages Richard. Jackson introduces the doctors to Harper. Derek, Owen, and Mark discuss their days. Richard thanks Derek for getting his groove back. Arizona, Callie, Bailey, Mer, Lexie, Cristina, and Teddy play baseball.