Dr Bendor Grosvenor investigates two paintings found at Petworth House in West Sussex, while Emma Dabiri explores the life of one of its owners, the third Earl of Egremont.

At the Manchester Art Gallery, Dr Bendor Grosvenor discovers a painting of a country gentleman from the 1770s which he believes has been misattributed to Nathaniel Dance. He feels sure it is in fact by the German painter Johann Zoffany, a favourite portraitist of the royal family under King George III. While the painting is restored, Bendor investigates the life of Zoffany - a chancer and adventurer who squandered his royal patronage through a series of predictable errors of judgement.

In Knightshayes Court Devon the team are examining a work that is a copy of a Rembrandt. But, might it be the real thing, a genuine self-portrait?