S6, E1: When Anspaugh decides to retire as chief of staff and return to surgery, he appoints Romano as his replacement. Greene expresses reservations about the decision, but Weaver does not support Greene. Romano makes Weaver the new chief of emergency medicine. Carter has a rendezvous with Elaine Nichols (Rebecca De Mornay), the former wife of one of Carter's cousins. Jeanie and Dr. Cleo Finch treat an end-stage AIDS patient whose 9-month-old son is also HIV positive. Jeanie's boyfriend, police officer Reggie Moore, proposes marriage. Croatian transplant Dr. Luka Kovac impresses Hathaway with the gentle way he treats a young patient. Benton and Carla attend a meeting with a family mediator concerning their son, Reese. Greene's mother dies.