Gethin Jones delivers the ultimate guide to a countryside summer featuring wildlife, food, gardening and outdoor adventure, all brought to you by a selection of favourite faces. In this episode, Nadiya Hussain learns all about garlic and shows us how to make a delicious garlic dressing, Arit Anderson gets a tour of landscape designer Dan Pearson's private garden, and Chris Packham and Megan McCubbin share a special encounter with dolphins.