Catherine Southon and Philip Serrell continue their antiques adventure in a classic Citroen. In Winchester, Catherine finds a jolly nice croquet set and, in Alton, she finds a rare 1930s novelty biscuit tin, both of which give her a chance of huge profits at auction in Christchurch.

Meanwhile, Phil learns how flying boats gave us the word airport. Catherine unravels the story of a top-secret unit of World War II spies working in occupied Europe and the crack team of code deciphers back here in Blighty tasked with keeping their undercover colleagues alive. Show less