Each week, Supernanny promises to transform the lives of a different family and put a stop to the unruly bad behaviour of children who are driving their parents insane. Having tackled tantrum-prone toddlers in series one, this time Jo takes on a range of problem children from terror tweens to troublesome teenagers, and from destructive daughters to children who won't eat, sleep or go to school. In her frank and upfront style, Jo forces each family to confront the real issues behind the bad behaviour. Then, with her recipe of strict discipline and tried-and-tested techniques, she sets about teaching the parents how to turn their kids around; but can she meet these tough new challenges with each family in just three weeks?