A nine-year-old girl is rushed into resus with memory problems after slumping over her desk at school. Consultant Liz has difficulty making a diagnosis, suspecting the pupil may have a viral infection that causes a swelling of the brain. A woman with a history of anxiety attacks requires a scan after being brought in suffering from numbness down her left side, and an 11-year-old boy is treated for a broken leg after being knocked down by a car.