Food Unwrapped: Season 17, Episode 5

17 - 5: Favourites: McVitie's, Corks, Mascarpone

Another selection of the team's favourite investigations. Kate Quilton visits McVitie's in Carlisle to find out why so many biscuits have little holes all over them. Jimmy Doherty heads to Portugal to see how corks are made for wine bottles, while Matt Tebbutt is in Italy to learn why mascarpone is more expensive than other soft cheeses.