This episode focuses on patients rushed into King's after being involved in serious traffic accidents, and shows that not all problems are immediately obvious. Steve, a 48-year-old retired soldier, arrives for special treatment after driving off a road and being found unconscious at the wheel of his car. But doctors don't know whether Steve lost consciousness before the crash so they need to run tests to ascertain what happened. Eleven-year-old schoolgirl Scarlett has been knocked down by a car on her way to the Science Museum. She's anxious on arrival so the King's team, led by consultant Firas, have to calm her down so that they can treat her. Seventy-year-old Pauline was hit by a car that mounted the pavement, seriously injuring her lower legs. As someone who's always put others first, Pauline reflects on the novelty of having to let others do things for her.