Older parents Doug and Sandra struggle with their four-year-old twins, George and Nicole. This pair of tag-team terrors have been known to have four-hour tantrums. The twins are at their worst when out in public. They often resort to kicking, screaming, lying down in the street, throwing items around the supermarket and generally causing such embarrassment to their parents that they just do not know what to do. Now these beleaguered parents are pinning all their hopes on Supernanny Jo Frost. Mum in particular is hoping that Jo can help her to turn things around, as she feels that her four-year-olds only ever listen to dad. Jo's clever techniques for the 'terrible twosome' include: a shopping involvement technique, tantrum control - with a calm-down zone and reward charts.