Returning early from maternity leave, Bailey (
Chandra Wilson) is anxious to repay a favor to Addison (
Kate Walsh) by treating her for a delicate "feminine" problem. Izzie (
Katherine Heigl) grows ever fonder of heart-transplant patient Denny (
Jeffrey Dean Morgan), much to the dismay of Alex (
Justin Chambers). After spending the night (and morning) together, George (
T.R. Knight) and Meredith (
Ellen Pompeo) can't stop quarrelling at the workplace; and in a later development, George falls downstairs--and into the hands of attractive orthopedic surgeon Callie Torres (
Sara Ramirez) in her first series appearance). The arrival of Mark Sloan serves only to remind Derek (
Patrick Dempsey) of why he broke up with Addison. And Burke (
Isaiah Washington) can't help but notice something wrong in the relationship between an aneuryism patient and his future bride. ~ Hal Erickson, All Movie Guide