The ED staff are surprised when Sam shows up to work in scrubs instead of his usual suit. He reveals he has stepped down as medical director, and is now joining the department as a speciality doctor. Dylan struggles to cope in the wake of Cal's death, and ends up having a panic attack while trying to treat a feisty retired nurse who admitted herself to hospital with a self-diagnosed heart attack. Luckily, David is on hand to reach out to the difficult patient, and get to the bottom of what's bothering Dylan