Andy and Milo treat a woman with an enlarged heart and conflict about what surgery to perform on her. Lu gets angry with Marc after he stays out until after midnight and insists that she babysit him until he is more responsible. Andy tells a sexually active elderly woman that she has HIV. Lu finds out about a terrible hospital error when trying to find a matching bone marrow for a young leukemia patient. Lana and Peter search the inner city for a woman whose aorta could burst at any time and face some frustrating difficulties. (thetvdb.com)