05/17/2016 (09:00PM - 10:00PM) (Tuesday) : DR. RHODES TREATS HIS MENTOR AND DR. HALSTEAD GETS SOME CLARITY IN THE SEASON FINALE - Dr. Rhodes (Colin Donnell) tends to the care of Dr. Downey (guest star Gregg Henry) while Goodwin (S. Epatha Merkerson) is forced to deal with personal issues. April (Yaya DaCosta) bears the brunt of a punch while attending to a disorderly patient, but the incident could actually prove to be a blessing in disguise. Dr. Halstead (Nick Gehlfuss) discovers Goodwin has a trick up her sleeve and Dr. Manning (Torrey DeVitto) finds her past catching up with her. Sarah's (Rachel DiPillo) graduation day finally arrives, but she remains conflicted about mapping out her career plans for the future. Meanwhile, at the urging of Dr. Charles (Oliver Platt), Dr. Choi (Brian Tee) turns to an unlikely source for help. Marlyne Barrett also stars.