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 11, Chen leaves to care for her ailing father and Carter also departs the ER to return to Africa with Kem. Elsewhere Lewis is promoted to ER Chief, Abby and Neela begin their internships along with newcomer Ray Barnett, Carter and Lewis compete for tenure, Weaver finally meets her biological mother, Kovac and Sam’s relationship deteriorates and Gallant makes an unexpected return from Iraq.