Carter's plan to help an ailing doctor leads to a dead-end — and a decision about his own career path. Pratt intervenes after a burglary lands Leon's pal in the ER, along with the cop his so-called friends shot. Kovac goes AWOL from his job after Weaver is unsympathetic to his depressive spiral. Alderman Bright returns, bearing financial gifts of gratitude for Weaver. Corday is caught off guard by hot-shot new surgeon, Dr. Dorset, and Romano risks his standing at County by overseeing an operation he is incapable of completing. Abby's brother Eric, now on his bipolar meds, visits and reconciles with her.