Abby is threatened by an over-medicated psychotic patient and gets an update regarding her missing brother. Elsewhere, Dr. Romano continues to make rash judgments -- and enemies -- when he orders a man with a severe sore throat to be released and then tries to perform surgery in the emergency room. Dr. Kovac welcomes a old friend -- a fellow Croatian doctor -- to observe the chaos of an American inner-city hospital. Carter also receives some emotional news from home as he guides a group of eager medical students who witness him refuse to give up trying to save a cardiac-arrested patient.