This season, Dr. Will Halstead has to deal with the challenges of becoming the ER’s newest attending, Dr. Connor Rhodes steps out of his comfort zone as he transitions into the cutthroat world of cardiothoracic surgery and Dr. Daniel Charles trains Dr. Sarah Reese in the mysteries of the human mind. Joining the team as a fourth-year med student is ex-Chicago Fire stalwart Jeff Clarke and Dr. Isidore Latham, Connor’s strange and difficult new mentor. Together, they will confront Chicago’s most critical medical cases and challenging ethical dilemmas.