Ari Morgan

Dr. Choi and Dr. Charles have difficult decisions to make as a dying man tries to preserve his life with a controversial scientific method. Dr. Marcel and April clash over how to handle a mysterious patient, and Will questions Natalie's capabilities.

Halstead returns to Med to help Goodwin with a secret investigation; Archer and Charles deal with twins who insist on being identical inside and out; Stevie and Dylan treat a young patient with sickle cell anaemia.

Charles and Manning disagree on how to handle a patient who is poisoning herself, while Halstead has suspicions about Natalie's new boyfriend.

Choi hires an old Navy colleague to join him in the ED; a final custody hearing threatens to separate Charles and his daughter; Maggie must make a choice that will change Auggie's life.

Shocking information threatens Jack Dayton's surgery and the future of OR 2.0. Archer goes rogue to save a patient in need. Maggie questions her future at Med.