One minute they're bewilderingly grown up and the next they're a child again: teenagers present parents and doctors with a unique challenge. It is said that 'the day we fret about our future is the day we leave our childhood behind' and this episode follows two teenagers making their own life-changing decisions about medical treatment, while a third is rushed to hospital after some youthful risk-taking leaves her with a potentially serious injury. For 16-year-old Jack, life is about his mates and going to gigs. But he is also a severe epilepsy sufferer, and wants to have pioneering brain surgery to stop his frequent and debilitating fits. But there is a risk that the operation could permanently affect his memory and personality.