It’s not every day the Marks get the chance to buy some original Picassos, but that’s exactly what happens when four stunning lithographs come into the shop. But are they the sur-real deal or not! Later they get the chance to buy a model plane – but this is no Airfix kit – it’s a fully working replica of a Spitfire. Will the deal for an iconic piece of British History take off? Then the boys get to let off some steam at the shooting range when they have the opportunity to fire a Heckler and Koch G3 Assault Rifle.