Alan Titchmarsh reveals treasures hidden throughout the National Trust. He starts with Knole in Kent, once one of the most sought after palaces in the country. Plus, Joan Bakewell follows some of the priceless paintings from Knole to a leading art conservation studio, and Miriam O\'Reilly examines one of the largest collections of dinosaur tracks ever found in the UK. Meanwhile Anneka Rice discovers five-houses-within-a-house at Croome Court, Shropshire.   Release Date’ 17th Sept 2018 No. Discs’ 5 DVDs Cert’ E Running Time’ 9hrs