The IT systems have failed, causing chaos, but Casualty still need to treat a motorcycle courier who's had a head-on collision, and a man with severe abdominal pains.
During a busy shift in Resus, a 58-year-old woman arrives by ambulance with a dangerously fast heart rate, and another patient arrives following a suspected drug overdose.
Patients include 87-year-old Ralph, who is struggling to breathe, Sallie, an 83-year-old rushed in after having a fall, and Karina who's dislocated her shoulder for the fifth time.