This season, Dr. Will Halstead (Nick Gehlfuss) has to balance the stress as the ER’s supervising Attending Physician while exploring a budding romance with Dr. Natalie Manning (Torrey DeVitto), emergency paediatrics resident. Rising star, heart surgeon Dr. Connor Rhodes’ (Colin Donnell) skills are put to the test with the arrival of a new, highly competitive Cardiothoracic Fellow, Dr. Ava Bekker.