The team goes behind the scenes at Mathewsons, a North Yorkshire-based, family-run car auction business which uncovers rare vehicles in Thornton-le-Dale. It attracts classic car buyers from all over the country.
Derek rubs shoulders with pop music royalty when he picks up a Morgan sports car; a World War Two ambulance arrives at Thornton le Dale and a Ford Model T needs a new home.
The Mathewsons welcome a 1982 Audi Quattro and a Sunbeam Alpine, and Derek takes delivery of a beautiful green Renault van previously used to carry bread in Paris.
Derek heads to Scotland in the mother of all rainstorms to pick up a Jaguar E-type and a rare MGC convertible. Plus, Dave extracts a rare Austin Gipsey from a lock up.
Derek collects a Ford Thames 400E that once belonged to the pop band Edison Lighthouse. Plus, Dave heads to York to collect an Astra GTE convertible.
Derek picks up a rare Ford Zodiac Farnham Estate, while Dave heads for an isolated tent in the Midlands to collect a Triumph Toledo.
There's a surprise waiting for Derek in Hull - a MGSA sports car that once had a tree growing through it. Plus, in North Wales, Alan Holmes is selling his son's Ford Escort RS 1600i.
A series of head-turning supercharged cars head to the Mathewson's auction room. Plus, going under Derek's hammer - a Ford Escort XR3 and a beautiful MGA.
Derek heads out to pick up a pair of beautiful Swedish models - a Saab 96L and a Volvo P1800ES. Plus, a rare British AC Aceca comes up for sale.
A 1967 Aston Martin DB6 lands at the Mathewsons' - Derek believes it could break the record for the most expensive car ever sold at the auction.
A collection of Austin Mini Metros arrive for auction. Also going under the hammer is a baby Fiat 850 coupe and a haulier offloads part of his vintage commercial vehicles collection.
There's an unlikely arrival at the North Yorkshire car auction - an Argentinian Army Mercedes G wagon that saw action in the Falklands War.
Derek has three scooters to collect, while also finding room for a Daimler and a teardrop caravan.
Derek's on his way to Blackpool to pick up what will be the highest-priced item at his next auction, but the 1970 Aston Martin DBS needs a tow to the local garage.
Over the years Derek has learnt to always expect the unexpected. So when Call the Midwife star, Cliff Parisi, drops off his Bedford CA campervan it's just another day at the office.
Derek picks up an impressive five vehicle haul from a collector who can no longer look after his motors. Paul's out on the road too - he's collecting a rare 1972 Lancia Fulvia Berlina.