Secrets of the National Trust

Alan Titchmarsh gets exclusive, behind the scenes access to Knole in Kent. It was once one of the most sought after palaces in the country, so desirable that King Henry VIII demanded it for himself.

This impressive new history hunt moves on to the Lake District. Or at least, its primary host Alan Titchmarsh does, as he tells the life story of Beatrix Potter.

Alan Titchmarsh visits one of the National Trust's grandest properties, Attingham Hall in Shropshire to tell the incredible story of the 2nd Lord Berwick, the cavalier 19th century owner who squandered the family fortune.

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 visits one of the UK's most spectacular country houses, Lyme in Cheshire, made famous as the backdrop to the TV series Pride and Prejudice.

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.