Blue Peter's Valerie Singleton and Diane Louise Jordan pair up with Paul Laidlaw and Phil Serrell as they compete to find the most profitable antiques. One team plump for an elephant and an eagle in a bid to make a lot of money at auction. Their rivals hope a Georgian cutlery tray will serve up a profit at the Stratford-upon-Avon saleroom. Diane detours to learn about the transformation of a grand country estate into a highly rated military hospital during World War One, while Valerie discovers the 19th-century process that revolutionised the world of photography. Known smiler Phil gladly poses for a photo with a predictable outcome.