Alan is in North Wales, discovering the unique story of Erddig, a grand mansion where the servants and the Yorke family, who owned it for many years, enjoyed a very close relationship. At Powis Castle, Nigel Havers checks out some magnificent topiary, and Miriam O'Reilly learns how servants were kept very firmly in their place at Calke Abbey, Derbyshire.

• Suzannah Lipscomb
• Alan Titchmarsh