Eric Knowles challenges the people of Lincolnshire on their antiques knowledge. Can they guess his mystery item? It's from the 19th century, it can be made of pewter or tin, it has a pumping action and an ever so tedious link to Lincolnshire history. Over at Hemswell Antique Centres, the reds and blues are pumped up as they go head-to-head to see who can buy the best items to sell at auction. They hope to make some profits, guided by auctioneer Colin Young, up the road at North Hykeham. Expert Catherine Southon is leading the reds, twin sisters Beth and Ellie, as they're challenged to find an item that comes in a matching pair. The blues, father and daughter team Luzani and Syhann, with expert Mark Stacey, are tasked with buying an item that comes in a set.