The Carters are an everyday working-class family from Milton Keynes - until 11-year-old Harry creates a social networking app that takes the world by storm. Snapped up by American tech tycoon Trent Zebrisky for £10m, his app turns the family into overnight multimillionaires.

Liz and Tony go away for the night leaving the hapless Oliver in charge and Harry takes advantage of his parents' absence and his new popularity by throwing a house party.

Tony decides it is time to teach his millionaire son the value of money, while Liz and Ellie get caught in a sticky situation when they check out a luxury mansion.

The house gets hectic when Trent and his entourage come to stay, while Harry's school report is far from satisfactory so Liz pays a visit to his teacher.

Tony signs a reluctant Harry up to the Wildboys' Wilderness Survival group, while things quickly start to go wrong when Liz tries to connect with Ellie online.

Harry gets caught in the firing line when a kid from computer camp claims he invented Honc, but things do not go according to plan when Liz and Tony try to help. Last in the series.