Arthur is given new responsibilities now that he is an F2 and put in charge of Keller for the day. As he struggles to work with Chantelle after she rejected his advances, the ward starts to fall into chaos when a family member of a patient goes off the rails. Distracted by Jonny's excitement about her next scan, Jac finds herself on the back foot when a patient she had previously operated on returns to Darwin with new complications. Sacha tries to stay positive as the results of Rachel's bone marrow transplant are due, but unfortunately for him, the world's most pessimistic patient has just entered AAU