ER is an American medical drama television series about the inner life of the doctors and nurses of fictional County General Hospital in Chicago, Illinois. In season 12 Kovac and Abby become the main central characters and their relationship slowly starts to get back on track as they deal with her unexpected pregnancy. A new nurse manager causes friction among the staff, following a successful operation Weaver no longer needs her cane, Pratt journeys to Africa where he joins Carter on a relief mission while a face from Sam’s past leaves the lives of Abby and Kovac hanging in the balance.