Addison returns to perform an operation at SGH and is surprised by the changes in the lives of her colleagues. Derek and Meredith's clinical trial gets its first patient, and Rebecca / Ava returns (again!) with some shocking news for Alex...
Thurs., May 8, 9 p.m.
"The Becoming" (NEW, ep. 4.14)
A "date and tell" policy is instated at the hospital after the nurses object to Mark's exploits. Cristina has to face that she still has feelings for Burke, and Bailey struggles with her own personal problems. Meredith and Derek admit a veteran to their clinical trial.