Legendary Olympic runners Linford Christie and Katharine Merry team up with Road Trip regulars Christina Trevanion and David Harper in a race to make the most money from antiques. On their trip through Oxfordshire, Linford pins his hopes on a tiny brooch, despite it costing a three-figure sum. Katharine, meanwhile, buys an item from the 1920s on the hunch that it will appeal at auction. Katharine also finds time to throw sticks at Aunt Sally while Linford learns about another pioneering sportsperson. Who will take the top spot on the podium at auction in Buckinghamshire?