BBCDOTCOM body first Begin iStats 20100118 (UX-CMC 1.1009.3) End iStats (UX-CMC) For a better experience on your device, try our mobile site . Pre mast BBCDOTCOM leaderboard template:client-side journalismVariant: false ipIsAdvertiseCombined: true adsEnabled: false flagpole: ON showAdAboveBlq: true blqLeaderboardAd: true Skip to content Skip to local navigation Accessibility Help BBC iD Settings Sign out News Sport Weather Capital Future Shop TV Radio More… Search term: BBC Four Infested! Living with Parasites empty styling hook. don't use blq-local-nav for styling. No blq-local-nav as it's in the product navs Home Clips Galleries Not currently available on BBC iPlayer Duration: 1 hour Dr Michael Mosley explores the bizarre and fascinating world of parasites by turning h...