Mark and Elizabeth squabble after he disagrees with her treatment of his father. Carter gets in trouble when a patient that he had discharged for insurance reasons comes back into the hospital near death. Weaver is suspended after disobeying a direct order from Romano, regarding the care of a mentally challenged girl. Kovac and Corday are faced with a blitz of possible kidney receivers, but Luka has a problem with the one who gets it. Cleo and Benton endure Romano's ire for scribing a messy prescription that nearly kills a man; they later have sex on the stairs at her place. Chen faces some personal obstacles when treating a man who refuses to tell his daughter about his genetic condition.