ER explores the inner workings of an urban teaching hospital and critical issues faced by the dedicated physicians and staff of its emergency room. The pulse-pounding drama features new challenges each season, from exploring personal problems outside of Chicago's County General Hospital to the political issues being raised inside. Each season features new additions, including chief resident Kerry Weaver, Alex Kingston as British surgeon Elizabeth Corday, Paul McCrane as abrasive Dr. Robert Romano, and Lucy Knight (Kellie Martin), a third-year medical student starting her rotation. It’s always rush hour at Chicago’s County General where every day brings triumphs and losses. As Dr. Greene fights his final battle, his former student, John Carter, must step in as Chief Resident to lead the group of healers. Meanwhile, Kovac’s wild ways begin to affect his job performance, Susan Lewis gets married, and Weaver gets promoted. Plus, Carter and Kovac return from their time in Africa.