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A quarter of a billion dollars' worth of military hardware is on board the Alaskan railway, but a rogue gunman threatens to derail the journey.

After an accident, veteran off-gridder Jim James attempts to reach the hospital by train, but obstacles may put him in jeopardy.

In the wilderness, homesteaders team up to track down an abandoned cabin washed down stream and trapped in ice. Plus, a freight crew dodges intruders.

How do they make wind turbines with twice the wingspan of a Boeing? Plus, how do they mould car tyres from the ooze of a tree.

How do they make the tank piercing super bullet? Plus, how do they forge the infamous torture weapon, the dentist's drill.

How do they make giant floating power stations that provide power around the world? Plus, how do they fabricate the world's smallest aircraft.

How do they create coloured crayons used by children and artists around the world? Plus, how do artisans and craftsmen create treasured mirrors in India.

Jimmy brings a turbo-charged Porsche 944 into the workshop. The team shred the kilos to have it racetrack ready. And a lucrative commission comes in.

Henry and Sam are in the Cotswolds to visit the largest sidecar manufacturer in Britain. They uncover a rusty Lancia Aurelia and a Royal Enfield 500.

In Somerset, Sam and Henry meet a man who's been collecting cars since 1963. The guys are excited to uncover an Austin 7 and a De Dion-Bouton.

Sam and Henry visit one of Britain's biggest dealers in second-hand milk floats. This quirky collection features a beautiful 1959 Chevrolet El Camino.

Sam and Henry look through an eclectic collection in Hertfordshire. There's lots for the guys to admire, including a Humber Sceptre and a model aircraft.

Henry and Sam are in Oxfordshire to rummage through a collection of vintage tractors and automobiles. They find a Suzuki SB200 and paraffin dispenser.

In Devon, Henry and Sam are on a mission to buy automobilia for a client's man cave. The guys uncover a 1937 petrol pump and a pricey tyre inflator.

After eight years of waiting, the guys are finally granted access to an incredible collection. They immediately spot a rare 1930 Wolseley Messenger.

Sam and Henry rescue interesting items from a scrapyard in Devon. The guys find some classic vehicles, including a neglected Jaguar Mark 1.

Sam and Henry visit an incredible collection of Ford vehicles in Worcestershire. But the guys have their sights set on a 1960s Austin A40 Farina.

Sam and Henry are in Dorset to look around a collection of bikes, cars and tractors. The guys consider buying a pedestrian walk sign and a Yamaha FS1-SE.

Dave designs a Mustang for the ages to compete in the Optima Challenge. The build includes a new front facia and hood and redesigning the rear end.

The 1965 Mustang makes its way through the metal shop and is now ready for paint and final assembly. But making it function will test even the Kindig crew.

Dave has decided that the time is right to design his own concept car from scratch. It's a huge job that involves all the different departments in the shop.

Motorcycle enthusiast Ellie wants to find a car that's fun to drive. Paul and Helen help her pick out a supermini that feels quick and looks good.

Paul has owned over 250 cars and now wants something exotic. With a budget of £35,000, he's looking for a stylish grand tourer with a powerful engine.

A survival expert wants a comfortable sports car with good handling and head turning looks. Will he be tempted by a 2008 Audi R8 or a Jaguar F-TYPE R.

58-year-old Terry has a cash budget of £25,000 to spend on an SUV. He wants an environmentally friendly motor with a big boot and stylish looks.

Classic car expert Paul Cowland and builder-restorer Helen Stanley help buyers find their dream rides within their budget - from SUVs to high end sports cars.

Classic car expert Paul Cowland and builder-restorer Helen Stanley help buyers find their dream rides within their budget - from SUVs to high end sports cars.