Only Fools and Horses - Time on Our Hands

Raquel's parents have been invited round to Trotter Towers for lunch and Del is planning on making a good impression. Hopefully Uncle Albert won't use gravy granules instead of instant coffee this time. It turns out that Raquel's father knows a thing or two about antiques, knowing the difference between an artificial human leg and a Queen Anne table leg. He spots something in the lock up that could be quite valuable, could it be true that it may even make them millionaires