Disc.Turbo+1

How can steel repair itself? How do they create the world's most powerful bikes? And how is wood transformed into paper.

Find out how they make military helicopters, how they design metro systems and how they engineer artificial reefs.

A newly qualified driver has a monthly budget of £150 to spend on her first car. Helen and Paul help her pick out a stylish and practical supermini.

Artisan baker Chris wants to ditch his diesel Audi and use part of his pension to fund a dream upgrade. He's hoping for a sports car with lots of power.

Drew and Paul rescue a classic: a Vauxhall Viva. The car was extensively modified in the 1960s but after years in storage, it's well past its best.

Presenter Henry Cole and motorcycle restorer Sam Lovegrove scour the UK's sheds for hidden vintage automotive treasures to fix up and sell on.

Henry and Sam are in the heart of Oxfordshire where they find rare Minis, 1970s Rollers, and a pristine rally car - but can they get her running.

Richard joins the crew of one of the biggest moving objects on earth, the Marie Maersk container ship, on her continuous 28,000-mile voyage from Asia to Europe.

Derek finds a 1937 Chevrolet Deluxe that's been off the road for 20 years. But can it make the 150-mile drive to the General Motors headquarters in Detroit.

Chad Hiltz helps his friend James to build a promotional truck to help sell his cider business. The team uses a 1934 Desoto Airflow as the base for the new car.

Double Trouble. Ant buys two Jaguar XJS, hoping one can donate spare parts. But with brake problems and the gearstick floppy, are they just double trouble.

In California, a dam collapse causes chaos. In Massachusetts, the tallest library starts cracking. In Italy, a vital bridge comes crashing down.

Paul has paid just over £15,000 for an Alfa Romeo 2000 GTV that appears to be in great shape. However, Drew is horrified when he learns it's an automatic.

At the Ridler tech test, Dave and Kev scramble to fix a transmission problem. When the show opens, they get their first chance to see the competition.

Mike snaps up a Jaguar S-Type with 195,000 miles. After some repairs, the boys put it up against another model with just a tenth of the miles.

Henry and Sam are on the west coast of Cornwall. Sifting through 50 years of vintage vehicles, they find the first-ever Lotus Elan and a pre-war Sunbeam.

Henry and Sam are in Oxfordshire, checking out a shed full of oversized items. Henry likes a tractor in blue and Sam falls for a Midget racer in a hedge.

Chris gets behind the wheel of a WRX supercar, as he joins the grid in Spain on a quest to earn FIA championship points.

Chris is driving and jumping a vehicle unlike anything he has ever driven before -a monster truck. He has his hands full with the five-ton monster.

The guys unearth a rare 1958 Land Rover Series 1 in a shed full of junk. Then, they transform a 1972 Mazda Bongo van into a micro-home for millennials.

In California, a catastrophe cuts one of America's most vital highways in two. In Texas, a refinery explodes with deadly consequences.

Mike is in the Pacific Northwest, where he has tracked down a true 'barn find': A Volvo Amazon 122 with a rally heritage. Ant is tasked with making it roadworthy.

Chris gets behind the wheel of a WRX supercar, as he joins the grid in Spain on a quest to earn FIA championship points.

Chris is driving and jumping a vehicle unlike anything he has ever driven before -a monster truck. He has his hands full with the five-ton monster.

Richard joins the crew of one of the biggest moving objects on earth, the Marie Maersk container ship, on her continuous 28,000-mile voyage from Asia to Europe.

'56 Ford Back To The Future. Joe uses all his tricks to make the '56 Ford truck look like it's been parked in a field for more than 50 years but drive like a modern muscle machine.

Australia. Mike and Elvis hunt for Australia's favourite pick up, the Hilux. Despite years of farm use, the boys aim to create the ultimate off-roading beast.

How is rubber made into chewing gum? How are fish hooks strong enough to catch a shark? How are the models built at the world's largest Legoland.

How do they build Formula 1 racing cars? How is the Leatherman, America's best-selling multi-tool made? How do they create classic Finnish Aalto glassware.

A classic car expert loves his 1995 Mercedes, but it isn't modern enough for daily use. He asks Helen and Paul to find the perfect family hatchback.

A client has a monthly budget of £260 to spend on a small SUV. Helen and Paul are tasked with finding a motor that's comfortable and city friendly.

Paul has paid just over £15,000 for an Alfa Romeo 2000 GTV that appears to be in great shape. However, Drew is horrified when he learns it's an automatic.

Henry and Sam are on the west coast of Cornwall. Sifting through 50 years of vintage vehicles, they find the first-ever Lotus Elan and a pre-war Sunbeam.

Henry and Sam are in Oxfordshire, checking out a shed full of oversized items. Henry likes a tractor in blue and Sam falls for a Midget racer in a hedge.

Richard ventures 2km beneath the Alps into the world's longest underground railway connection, the Brenner Base Tunnel, riding some giant machines.

Derek and Sean Bieri head back to Zweifel Motors in the Black Hills of South Dakota to revive an Oldsmobile station wagon Derek has been eyeing for 16 years.

Chad Hiltz hosts an annual car show, Rockerbilly Weekend, in his back yard to promote Green Goblin Customs. The team build a cheap car for a big raffle prize.

A Labour Of Love. Ant hopes restoring and selling a 1973 Lotus Elan will help pay for more renovations at the farmhouse. But he hits major engine problems.

In California, a catastrophe cuts one of America's most vital highways in two. In Texas, a refinery explodes with deadly consequences.

Paul and Drew check out a BMW 323i that's been sitting in a barn for 12 years. Drew wants to give the car a tasteful revamp, but Paul has a flashier plan.

Chris gets behind the wheel of a WRX supercar, as he joins the grid in Spain on a quest to earn FIA championship points.

Chris is driving and jumping a vehicle unlike anything he has ever driven before -a monster truck. He has his hands full with the five-ton monster.

Mike gets his hands on a car that has evaded him for decades, a Mark 1 Ford Transit. Elvis is delighted - until he realises everything he needs to do.

Henry and Sam scour Britain's sheds for vehicles to buy, restore and flog for a tidy profit. In Somerset they find Norton motorbikes, Italian mopeds, and French go-karts.

The guys are in Hertfordshire, finding vintage cars, tractors and rare British bikes from the 1950s. When the haggling starts, things don't turn out quite as expected.

Sir Chris learns the ropes in a 911 GT3 Cup car, before heading to the Spa-Francorchamps circuit in Belgium to race the Porsche 911 GT2 RS Clubsport.

A nightmarish course created by viral-video legend Ken Block is Chris' toughest challenge yet. With no prep time, is this test too great to overcome.

Dave and GT spy a super-rare VW 'split-screen' Kombi Van that could be worth big money. Then, an outback barn leads to a classic Mercedes convertible.

In New York, a construction crane crashes into an iconic bridge. Tragedy strikes a massive television tower in Texas. Boston's water supply crumbles.

The fifth generation Ford Bronco is an American Icon. Mike gets his hands dirty preparing one for the biggest collector car auction in the world, Barrett Jackson.

Sir Chris learns the ropes in a 911 GT3 Cup car, before heading to the Spa-Francorchamps circuit in Belgium to race the Porsche 911 GT2 RS Clubsport.

A nightmarish course created by viral-video legend Ken Block is Chris' toughest challenge yet. With no prep time, is this test too great to overcome.

Richard ventures 2km beneath the Alps into the world's longest underground railway connection, the Brenner Base Tunnel, riding some giant machines.

'77 Trans Am Bird In Black. The crew gets stuck into a legendary '77 Bandit Trans Am - and they're going big on style. Then, a '67 Chevelle returns for a supercharger engine.

Australia. Mike and Elvis hit the beach for the ultimate surf wagon: the iconic Holden Sandman. Can they transform a drab panel van into a hit budget version.

How do they make the finest Panama hats? Who rounds up Florida's escaped pythons? How do they keep drivers safe in the world's longest tunnel.

How do they build working miniature airports? How do they design houses to survive hurricanes? How is rhubarb cultivated in the dark.

Abbey is tired of sharing cars with her parents and wants a spacious hatchback of her own. Can Paul and Helen find a suitable motor worth no more than £5,000.

Helen and Paul help a client who wants a saloon car with good looks and lots of power. They have a whopping budget of £35,000 to find the perfect motor.

Paul and Drew check out a BMW 323i that's been sitting in a barn for 12 years. Drew wants to give the car a tasteful revamp, but Paul has a flashier plan.

Henry and Sam scour Britain's sheds for vehicles to buy, restore and flog for a tidy profit. In Somerset they find Norton motorbikes, Italian mopeds, and French go-karts.

The guys are in Hertfordshire, finding vintage cars, tractors and rare British bikes from the 1950s. When the haggling starts, things don't turn out quite as expected.

Richard explores the huge Tottenham Hotspur Football Stadium in London. He explores a pitch that splits and rolls away and takes a terrifying walk on the stadium roof.

Steve Dulcich returns along with the Vanishing Paint Challenger. Derek and Steve switch out the gearbox and go to a local road course.

To The Moon! Chad creates a space-age drag car from a station wagon. He and the team imagine a car with wings, in-line seating and topped with an 18-inch bubble.

A Rare Revival. Ant uncovers an extremely rare 1980 Alfasud that's been locked away for 35 years. But he learns reawakening the engine proves problematic.

In New York, a construction crane crashes into an iconic bridge. Tragedy strikes a massive television tower in Texas. Boston's water supply crumbles.

The restoration of a rare Japanese icon is a chance for Drew to pay homage to one of his automotive heroes. But work stalls when Paul struggles to find essential parts.

Sir Chris learns the ropes in a 911 GT3 Cup car, before heading to the Spa-Francorchamps circuit in Belgium to race the Porsche 911 GT2 RS Clubsport.

A nightmarish course created by viral-video legend Ken Block is Chris' toughest challenge yet. With no prep time, is this test too great to overcome.

Mike returns Elvis to his F1 roots with a car from a big name in British racing: a Lotus Europa. Elvis is excited - until he takes it out for a spin.

Henry and Sam are in the Cotswolds, where they discover sheds full of stationary engines, obscure agricultural implements and some surprising collections of memorabilia.

Henry and Sam uncover vintage treasures in West Sussex. They go behind the scenes at one of Britain's most famous bike shops and find two extraordinary hidden gems.

Sir Chris heads to Rome to test the latest Gen2 electric race car under the watchful eye of Audi driver and former champion Lucas di Grassi.

For once, it's not Sir Chris Hoy wracked with nerves, as he joins James Deane for the finale of the 2019 Drift Masters European Championship.

Dave and GT's hunt for a 'Batmobile' mystery car reveals a 'yank-tank' 1958 Chrysler Imperial Crown. And a shabby 1989 Range Rover is returned to its former glory.

In Miami, a major disaster leaves a nation in mourning. In Canada, a gaping hole opens in the middle of the nation's capital, Ottawa.