The nurses go on strike, forcing the doctors and interns (with the exception of George [T.R. Knight], who refuses to cross the picket line) to soldier on all by themselves. With Bailey on pregnancy leave, her replacement is Dr. Sydney Aaron (Kali Rocha), the polar opposite of Seattle Grace's infamous "Nazi". Meredith (Ellen Pompeo) makes a mistake while treating a patient, and the error does not go unnoticed by the patient's gossipy friends (played by veteran actresses Betty Garrett, June Lockhart and Rae Allen). And elsewhere, the beleagured doctors must cope with a sullen pregnant teenager and a mysterious skin ailment. ~ Hal Erickson, Rovi