Disc.Turbo

How do they turn trees into toilet paper? How do they make absinthe and how do they make cricket balls tough enough to face batsmen.

How do they cultivate green salad on scorching desert plains, how do they make rigging for ships and how do they produce lifesaving insulin from bread.

An aerospace engineer has £20,000 to spend on a noisy and fast car. Paul and Helen will need to be creative to find an affordable big Coupe with rear seats.

Grant asks Helen and Paul to find him a prestige car that costs no more than £360 a month. He wants a sporty design, a large boot and a powerful engine.

A Lancia Fulvia coupe may be Drew and Paul most exciting project as they enter it into a prestigious concours event. But its problems could sabotage their ambitions.

In Cornwall, Henry and Sam find some very rare early-1900s steam-powered cars. If they're very lucky, the duo might even get to ride in one.

In Somerset, Henry and Sam visit a man with an amazing collection of motorbikes. He has some rare finds, but are they too expensive for the guys.

Richard faces the hard reality that the workshop isn't yet making any money. But a fast turnaround paint job on a Land Rover provides some financial respite.

In Michigan's Northern Peninsula, Derek finds a 1964 Ford Galaxie that's sat abandoned for 32 years. He plans to turn it into a rally-tribute car.

Chad's final build of the season is the centrepiece of his client's New Year's Eve celebration. The team scramble to work to the tight deadline.

Ant hopes restoring and selling a 1980 Triumph Dolomite Sprint will help kickstart his farmhouse renovation. But will rust problems erode his profit.

Justin's in for a bumpy ride as he investigates gigantic potholes in Louisiana. Later, he heads to London to get a sneak preview of London's vast Crossrail project.

Drew and Paul spot a classic Golf GTI at a film props company. And, at a barn in Suffolk Drew unearths an early 1970s Lotus Elan which needs radical restoration.

Danny and Penny Cobbs own an award-winning '55 big-window truck, but it doesn't run. They need Joe Martin to get this showstopper on the road.

Mike finds the perfect starter classic, a 1989 Audi Coupe. This rare car has a low mileage, but it's failed its MOT. The guys fix it up before a test drive in Cornwall.

Henry and Sam are in Suffolk, checking out a collection of vintage bikes. Henry has his eye on petrol pumps, but Sam has other ideas after seeing the sidecars.

In Lowestoft, Henry and Sam can't believe their luck when they check out Charlie's wares. He has everything from cars and bikes to stationary engines.

Joe and the team transform a '70s step van for a fan's whiskey business. Then they must find a new hood for a '54 Chrysler New Yorker station wagon.

Hidden in a shed by a farmhouse, the guys find a rare '60s gem: a 1968 Volvo P1800 coupe. Then the hunt is on for an Aussie classic, a Holden Kingswood.

Former aerospace engineer Justin tries to keep the Glasgow Tower turning, and Tomo helps engineers in Osaka keep their airport from sinking into the sea.

The boys visit Fuzz's friend Alex and his Rover collection, but they're sidetracked by a slightly troubled British icon: the Morris Minor Splittie.