The Grey's Anatomy exits might not be over yet, as the newest episode hints at a departure after a resident committed a crime. During the Thursday, March 26, episode of the ABC series, Kwan (Harry Shum Jr.) grew attached to a new patient: a father with a terminal cancer diagnosis and his teenage son. Kwan became frustrated when the FDA wouldn't approve treatment that could help the patient's tumor when the gel was available to them in the hospital.