MasterChef judge Gregg Wallace and greengrocer Chris Bavin spy on Maidenhead couple the Stantons, who turn out to be spontaneous shoppers - not only do they have no list and buy a lot of pre-chopped fruit and vegetables, they also don't purchase frozen food - and it seems that everything three-year-old daughter Sophia points to goes in the trolley. Gregg and Chris set to work swapping some of their favourite brands and showing them the benefits of using their freezer. Will they save enough money to get the dream holiday they deserve?