Best friends Gethin Jones and Dr Xand Van Tulleken battle to hunt out the finest antique treasures. They cruise across the Welsh border in a couple of rather large classic American motors, guided by experts Irita Marriott and Serhat Ahmet.Xand and Serhat discover their shared love of ceramics and set out to find the perfect piece to take to auction, while Irita hopes Gethin's command of the Welsh language will give them an advantage. And there are mind games in the battle of the porcelain pigs.Taking a break from shopping, Gethin and Irita take a train ride into the past to learn about Wales's railway history. Meanwhile, our other pair head to Chester to discover the impact the Romans had on Britain's pottery production, and amateur potter Xand tries his hand at throwing a pot just like an ancient Roman.Then it's off to Derby to see who the high-flier at the final showdown will be.