Five teenage couples put their parenting skills to the test by looking after other people's babies, toddlers, pre-teens and teenagers on a summer holiday. A catch-up on the main show, and the couples' family and friends tell how they think the teenagers are coping with the pressures. Six OAPs invade the teenagers' holiday homes and Amy and Nathan get a rude awakening when Frank, an 88-year-old retired sergeant major, finds them still in bed.