Disc.Turbo+1

Justin climbs on top of a stadium roof that is held up by air and in danger of collapse. Plus, Jimena Gascon discovers why Mexico City's Metro project has been derailed.

Justin uncovers the truth behind a landslide that wiped out a ski-jump resort in Turkey, before jetting off to Gibraltar to see an airport runway built across a road.

Would you ever believe a skyscraper can melt a car? Justin heads to London's Walkie Talkie building to unearth the science behind this building blunder.

RV builder Newmar designs their most extravagant coach for a NASCAR fan. A Colorado engineer creates a self-sufficient off-road expedition vehicle.

Richard gives $100,000 of his time, money and contacts to help rebuild Keys Customs in Key West, Florida, which was devastated by Hurricane Irma.

In Italy, a towering bridge collapses. In Connecticut, tragedy strikes a construction site. A bridge fails mid-construction in Canada's capital.

In California, catastrophe strikes one of America's most important intersections. Plus, there's a demolition disaster in Canberra, Australia.

In Arizona, a fire destroys a river crossing. In California, a concert hall causes a storm. In Ohio, a driver and her vehicle are swallowed whole.

In Sweden, tragedy strikes as a historic bridge is destroyed in seconds. A New Jersey casino is the victim of a massive disaster.

In Kansas City, stormy weather brings down the roof of a state-of-the-art stadium. In Canada, the routine renovation of a bridge goes badly.

The crew matches the two-tone paint job on the '53 Barn Door Deluxe build. They add a custom trim, a new engine, 22 windows and a custom interior.

Who Gets Number One? Dave and the crew proved they could execute Dave's production Corvette vision. But now that some have sold, they have to get them completely finished.

Dave and the team are putting the final touches on two remarkable 1953 Corvettes. Will their demanding clients be satisfied with the final product.

Henry and Sam go to Hull to meet Mandy, whose late husband was an avid collector of classic motorbikes. There are several rare Vincents and Ariels on offer.

Henry and Fuzz are in West Sussex at Dino's mega-shed. He's got buses, vintage sports cars, rare motorbikes and oodles of motoring ephemera.

Chopper Roy / Triton And Bantam. Henry and Fuzz head to 'Chopper Roy's' place. His vintage British motorbikes and a classic seventies sports coupé catch their eye.

Henry and Fuzz are down on the farm in Oxfordshire. They unearth mowers and tractors in Tim and Camilla's barns but end up buying something very different.

Richard's team work overtime to complete their first big restoration - a 1950s Alvis. Plus, they are under pressure to get their racing MGB fit for competition.