Derek discovers the holy grail of Austin Mini barn finds, a rare and valuable 1965 Cooper "S" 1275cc. The car has been hidden in a garage full of rubbish for 30 years and appears to be a worthless rusty wreck, but on auction day it generates a flood…

A rare and valuable 80's Sierra Cosworth "whale tail" draws in a crowd of admiring fast Ford fans, but has the owner pitched the reserve too high? Also, Derek reluctantly decides to sell some of his own classic car collection to make space in the showroom before visiting Britain's biggest one day motorcycle event. And a restorer delights buyers with his immaculate 1966 Sunbeam Rapier and Sarah takes a shine to a quirky micro-caravan.

Derek dives into the lost Jowett marque, as a 1952 Javelin finds an unexpected home. Paul and Dave find a Ford Escort that's been untouched for 30 years.

A very orange 1970's Bond Bug three-wheeler divides opinion among Mathewsons customers but delights the Bond owners club. A retired engineer reluctantly auctions off his late father's treasured 60's Jaguar MkII. He's had the car in his garage for 30 years but hasn't been able to part with the memories it holds. The owner of a Rover P6 sells the car he lovingly rebuilt for his daughter's wedding and is philosophical despite losing thousands of pounds on the restoration.

Mathewsons agree to sell a vintage threshing machine and collection of tractors, but extracting them from a Yorkshire farm proves a bigger job than anticipated.

A Cold War Soviet classic goes under the hammer. Built like a tank, the Mosckovitch gets few admirers for style, but finds a home with a fan of Eastern Bloc classics.

Derek collects a Jaguar Mark 2 and explains why they made such poor getaway cars for 1960s bank robbers. A customer considers a Morris Marina as a Christmas present for his wife.

The team is under pressure with a record number of cars to auction, but Derek finds room for one more - a replica AC Cobra. A couple are reunited with their Volvo breakdown truck.

A classic car fan with a love of the Jaguar E-Type reluctantly sends his dream car to auction, hoping to buy a motorhome with the money. Two Ford Escorts get Dave's pulse racing.

A widow reluctantly parts with her husband's treasured collection of Rolls Royces and Bentleys, and an impulse buyer finds one of the cars a new home.

A near-perfect ‘50s Chevy panel van and a very desirable low-mileage ‘80s Brooklands Capri tempt auctioneer Derek out of Yorkshire, but traffic chaos on the way to Wales puts him way behind schedule. "I can't be late, I've got no pyjamas" ...says a worried Derek as he realises he is going to have to overnight across the border. Safely back in Yorkshire, he evaluates the cars ahead of the auction - two of the best he has seen. The vehicles' owners have high expectations, the reserves are top end - and the auction is days away. Paul picks up a stunning Matchless Model X motorbike which attracts a lot of pre-auction attention from some vintage motorcycle fans, and Derek and grandson Charlie spend the day at Stokesley Classic Car Show. It's not a relaxing day out for the pair as they've been set a monumental task - valuing the 200 classic cars.

The summer brings an increase in business for Yorkshire classic car auctioneers. To keep pace, the Mathewsons introduce their new "multiple classic collection plan", much to the amusement of office manager Sarah. Dave sets off to collect a Triumph TR6, a Lotus Cortina and a Mini Mayfair wedding car and bring them back to the auction house. The team heads to The Wirral for a rare survivor, a DAF 33 from the ‘70s. "It's a car that had a bit of an image issue back in the day, but it also had a gearbox ahead of its time," says Derek - as everyone tries to explain how it works before the car is auctioned off.

Anglophile Derek struggles to get his message across on a rare trip abroad to pick up a Bentley, while a well-restored Ford XR2 sets the auction alight.

Dave finds a very rare 70s Sunbeam Lotus that has been rotting away in a farmyard for 29 years, while a Morris Minor convertible goes under the hammer.

A delightful collection of British classics comes up for auction, including an Austin A35 and a Hillman Avenger Estate in stunning condition. An E-Type Jaguar also hits the auction.

Three MGs from the 70s turn up at the garage, still covered in original factory wax. Nobody can believe it, or value them. A Morris 1000 turns up at the auction along with a TR7 V8.

Three rare Alvises get the auction buyers going when put under the hammer. A Chevy Corvette which started its journey in Saudi Arabia makes its way to Thornton le Dale for the sale.

Dave gets a nasty surprise when he opens the bonnet of a fast Ford from the 80's, and an Austin Heavy 12 nearly a century old sets off a bidding war at the auction.

Derek, with help from the Mathewson clan, drag a mini pickup out of the barn where it's been for 20 years, and a 350cc Douglas Mark V motorbike from 1950 goes under the hammer.

Four VW camper vans pitch up at the auction house looking for a new home and Derek picks up an Austin 16 that 'goes like stink and has some unusual modern modifications'.

Derek auctions off a Jensen Interceptor and a Jensen Healey along with a one-off Wood & Pickett Triumph Dolomite Sprint and Sarah takes a shine to a four-tonne road roller which needs a new home.

A 1971 Mercedes SL and a 1989 Jaguar XJS emerge from a barn on a chicken farm, a Roller and a Rover go under the hammer and a 1966 Triumph Spitfire is restored to near perfection.

Derek takes a shine to a rare 1958 Armstrong Siddeley Sapphire with a long family history, a convertible Triumph Herald brings a few smiles on auction day and Sarah casts her critical eye over a set of wartime morale-boosting posters.

An Aston Martin DB6 in need of total restoration looks set to break the Mathewsons auction record and news of a rare Vincent motorbike arriving causes a stir.

Derek picks up some 'emerging' sporting classics from the Far East when three Datsun Zs appear, and an unusual lot arrives that run on caterpillar tracks not wheels.