Secrets of the National Trust

Alan Titchmarsh goes behind the scenes at Knole in Kent, Anneka Rice visits Croome Court and Miriam O'Reilly walks in the footsteps of giants on the Jurassic Coast.

Alan Titchmarsh reveals some surprising facts about Beatrix Potter. Plus a rare plant nursery, a time capsule and the UK's largest seal colony.

Alan Titchmarsh is at Attingham Hall in Shropshire, Jon Culshaw visits Disraeli's former home, Lisa Holloway watches a tapestry restoration in Norfolk.

Alan Titchmarsh, with celebrity experts and enthusiasts, reveals the hidden treasures to be found at Britain's historic houses and estates. Alan visits Quarry Bank Mill in Cheshire, an 18th-century cotton mill that is still home to a working mill as well as a museum. Oz Clarke uncovers some Civil War history at Dunster Castle in Somerset. Jon Culshaw visits a stately pile in an unusual location, Dan Jones joins an architectural dig on the south coast, and Clive Aslet visits the spectacular grounds of Biddulph Grange in Staffordshire.

Alan Titchmarsh pieces together the incredible rags-to-riches story of Thomas Legh, owner of Lyme in Cheshire. In Wiltshire, Oz Clarke learns the art of painted glass restoration, while Dan Jones is in Wales to discover the ingenious ways the Romans got their hands on gold.

Alan Titchmarsh reveals the secrets of the Cistercian monks who lived at Fountain's Abbey in North Yorkshire over 800 years ago, and visits its neighbour - the spectacular Studley Royal Water Garden. Anneka Rice is at Mottisfont in Hampshire and Britain's last working water-driven spade mill. Miriam O'Reilly joins a bat watch on the South Downs, and Dan Jones treads in the footprints of Giants in County Antrim.