The roadshow visits one of the grandest, historic houses in Wales, Powis Castle. Duncan Campbell discovers a very rare silver tobacco box from the 1600s, and Serhat Ahmet examines a porcelain egg with a royal connection. Meanwhile, Paul Atterbury is taken back to the earliest days of Doctor Who, while Alexandra Aguilar values a jade ornament bought at a car boot sale for 50 pence. Geoffrey Munn uncovers a jewellery collection ‘of the highest quality' with rubies and diamonds dating from the 1700s.