Five-year-old Isa is rushed to A&E after being hit by a car and trapped underneath it, and doctors suspect the impact may have caused serious internal damage, as well as significant head injuries. Meanwhile, 26-year-old Tom is treated after slicing through his leg with a circular saw, with medics fearing the blade has cut so deeply into the muscle tissue that it could starve his leg of blood. Plus, 85-year-old retired actor Donald comes to the hospital with pain in his bladder, and consultant Faheem is concerned there may be an infection.

In this episode, a thirteen-year-old Tom is rushed to St George's after crashing his bike head first into a parked car while racing a friend. Half of Tom's face is badly swollen and a scan is need to assess if he is suffering from any life-changing injuries. Elsewhere, a 26-year-old called Andy arrives at A&E after injuring his knee during a game of Frisbee.