A snowy Thanksgiving turns chaotic for Hathaway when she suddenly goes into labor on the subway and fights just to get to the ER -- where the real harrowing battle begins to save her premature twins with the help of an obstetrics nurse. At the same time, Hathaway's Lamaze mate, Dr. Greene, is unaware of her plight as he brings his precocious daughter and his cantankerous visiting dad over to Dr. Corday's for a traditionally dysfunctional holiday dinner. When Greene is notified of Hathaway's situation, he leaves poor Corday with his two relatives who each encounter a personal crisis. Dr. Malucci impresses Dr. Carter with his knowledge of a rare affliction.