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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.

How do they build one of the world's most powerful locomotives? And how do they turn cows' milk into clotted cream.

A look at how products are manufactured around the world. Looking at sardine fishing, Piaggio scooters and erector sets.

The crew faces a web of build and design issues customizing a 1970s Pantera. The 6'4' client must be able to comfortably get into the car.

The team agrees that the body mods for the Pantera are just right, but now the crew must make it a reality. An iconic '65 Fastback Mustang returns.

Now That Is A Kindig Custom. The custom Pantera is just about done - paint, assembly and upholstery sound easy, but nothing is as simple as it should be with this project.

.. That's A Kevdogg. Don takes a rare 1952 Pontiac to Dave. But the guys find something lurking beneath the metal that threatens the whole build.

Meet the two Mormon brothers-in-law running a vehicle bullet-proofing business that provides customised high-tech protection from bombs and sniper fire for its clients.

Around the globe lie eight 'Hell Roads', each with dangers. Meet the people who risk their lives braving avalanches, rockslides and even gunfire as they drive these highways.

Ant Anstead has 12 weeks until his baby boy is due, and the same amount of time to fulfil a childhood fantasy, to own a 1950s Alfa Romeo 158.

Ant has found a donor 1950s chassis, so his ambitious Alfa 158 build can now begin in earnest. He also digs deep into his inspiration for this project.

Ant visits an Alfa specialist and gets more than he bargained for. Its win-win, but it'll be tricky to fit a Spider's axle, gearbox and engine into his 158.

Ant is beginning to feel the pressure of his ambitious build. The only place he can get the correct body mould on short notice is more than 5,000 miles away.

Mike finds a BMW six-cylinder modern classic, the E46 M3, with the subframe already fixed. He challenges Ant to transform the transmission with new tech.

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.

An abandoned railroad track offers fresh clues about Bigfoot's whereabouts to the team as they push deeper into the forests of Northern California.

Russell uses an unlikely ally to pursue a strange predator. Meanwhile, while Bryce investigates the team's recent run-ins with mysterious floating orbs.

Did the atomic bomb alert extra-terrestrial governments to our planet? And are they now in league with our rulers to control the human imagination.

Have Aliens Invaded Scotland? Scotland has a long association with the mysterious and the paranormal. For its size, there are more UFO sightings than that of any other country.

Josh Gates sends the team to reportedly the most haunted place in America: Mackinac Island. This remote island has experienced over 1,000 years of bloodshed.

Jess and Phil are joined by The Ghost Brothers as they continue to investigate Mackinac Island's mysteries. They explore a lighthouse with a dark past.

Jess and Phil dive into the mysteries of Niagara Falls and its history of violent deaths. They investigate reports of disturbing paranormal activity.

A lost property auction in reveals an old-school boom box from the 1980s, while a buyer is over the rainbow about a rare 'Wizard of Oz' piece in a sealed trunk.

The buyers visit South Africa for a once-in-a-lifetime auction, and Billy appraises a ceremonial mask. Will profit still be made outside the specialist's comfort zone.

The revamped Myrtle Irene is back in action and on the hunt for gold. Vernon gives Steve another opportunity, and Kris finally finds some gold.

Shawn weighs gold from the Myrtle Irene's first run of the season - will it live up to his expectations? Meanwhile, Zeke's brother returns to diving.

Neville Perry returns to the legendary German Gully with unfinished business. Salty and Alan head to the world's biggest monocline in search of gold.

A young man is designing a home in rural Illinois. He and his friends use their experience as long-distance travellers to improvise the build through the winter.

A family builds their dream home overlooking the Atlantic Ocean, while pro snowboarder Sean Busby and his wife build a home with amazing views of Glacier National Park.

Sig and Mandy conspire to get Jake to do their prospecting, but he refuses to play along. Junior fears the worst when a deckhand falls from the stack.

Evidence suggests aliens are hiding in the unexplored depths of the ocean. Experts investigate reports of ghost ships haunting the seas around Alaska.

Josh journeys from Russia to Germany in search of history's most expensive stolen object, the Amber Chamber. He retraces the steps of Nazi soldiers.

Josh Gates hunts down new evidence on the disappearance of Amelia Earhart. He starts in Papua New Guinea, ending his journey in Fiji, hoping to find her remains.

Bus-dwelling Virginia homesteaders struggle for a foothold in the wilderness. The Raneys undertake one of the biggest rescues ever to reunite the family.

The Cheals' dreams of expanding their Opal Empire are crushed by the reality of juggling two mines. Slim Pickings' Lee gambles on mystery opal dirt.

Chris suffers a spider bite. Slim Pickings' Lee battles dangerous ground on a quad bike. A big mechanical failure halts Dan and Renee's enterprise.

A failed plan sees the Gold Gypsies run out of time and options. Meanwhile, the Dirt Dogs uncover a huge find -but there's a catch.

In the final week of the gold season, the Dirt Dogs gamble big to hit their tally. Kellie and Henri mount a last-chance hunt for big nuggets.

Dr Jeff performs surgery on Slash the dog who can't keep his food down and weighs 20-lbs less than he should. Plus, Winter the cat has a bloody wound on his side.

Match day is here and tensions are high throughout the hospital. Today the fourth-year students will find out if they have been matched to an internship program.