The team head to the Isles of Scilly. Ellie Harrison looks at the problem of rats on the islands and the devastating effect they have had on the local seabird population. At Penzance, Matt Baker boards a plane containing 50 ducklings, aiming to get them to the only duck farm on the islands. Matt also visits the only dairy farm on the islands, which supplies the only local milk. Ellie Harrison visits the beautiful privately owned island of Tresco, where they have recently imported some red squirrels. Tom Heap finds out why farming is one of the most dangerous British industries and looks at ways that we could make it safer, and Adam Henson visits a dairy farm where cows are not the order of the day