They are a must if you are a world leader, but now even mums are starting to use them. Discover how cars are modified for maximum protection.

Actually, this is "Science of Armored Cars", an "Inside"-episode, but it was shown on NatGeo UK as part of Megafactories.

The soon-to-be-released Chevy Volt electric car just might redefine the automotive world: It can go from 0 to 60 in less than nine seconds, hit a top speed of 100 miles per hour and is good for 40 miles of zero-emission, pure electric driving. Our cameras got rare behind-the-scenes access to the preproduction factory for this revolutionary vehicle.

AKA Megafactories: Chevy Volt, this seems to have only aired in the UK

An army of engineers in three different countries constructs the awesome Typhoon, which can reach speeds of over 2000 KPH.

Our cameras go inside the Audi R8 factory in Neckarsulm, Germany and follow the crafting of a road car modeled after a champion racecar. With the introduction of the R8, Audi breaks out of its elegant sedan image to create a sportscar that rivals the likes of Porsche and Lamborghini. Modeled after the R8 racecar that dominated at LeMans, the Audi R8 road car is a mid-engine two-seater with explosive power and a smooth ride. Audi has combined all of its engineering innovations over the last few decades into this one sportscarall wheel drive, an ultra-light aluminum spaceframe and high-tech fuel injection. Since its launch in 2007, the super sleek R8 has appeared in many films and TV shows, including: Iron Man, Transformers, Dirty Sexy Money, CSI: Miami, Chuck, and 17 Again. This car is grabbing the attention of sports car fanatics, photographers and automotive journalists all over the world.

As simple as it is successful, LEGO is without doubt one of the most popular toys of all time. This eye-opening trip to the company's high-tech factory reveals how robots and tricky test markets are behind the company's ever-popular police station set.

Made to a 150-year-old recipe in Europe's largest brewery, raise a toast to the men and women at the beer giant's Zoeterwoude home - where some 11 million hectolitres of thirst-quenching lager can be produced every year.

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A look behind-the-scenes at Aston Martin HQ in Warwickshire to reveal how the customised and coveted One-77 is designed and manufactured.

With a 75-year legacy of jaw-dropping design to protect, find out how space-age techniques borrowed from the aerospace industry aid the construction of the brand new XJ in the car firm's futuristic Castle Bromwich plant.

The Bugatti Veyron is a "super" super car - part automobile and part airplane. And with a base price of $1,750,000, it is the most expensive production car in the world. Designed with materials and construction techniques normally found in the aerospace industry, this remarkable engineering achievement is one of the fastest street-legal cars ever built. Now, NGC takes an insider look at the Bugatti factory to see how this modern engineering masterpiece is built.

Only a privileged few ever get behind the wheel of the slick, sexy Koenigsegg and, similarly, only a privileged few play a role in its lovingly hand-built construction. Enter their artistic Swedish factory. Discover how each powerful Koenigsegg car is lovingly hand-built, in a Swedish factory that looks more like an art studio than a car production plant.

The basic concept of the Koenigsegg is simple: a road car body that incorporates a Formula One racing car chassis. Koenigseggs are among the most exclusive super cars in the world with unparalled levels of performance. The combination of uncompromising quality in both finish and function and the use of space age materials make these super cars among the very best in automotive history. Koenigseggs are built to excel on the road or racetrack, yet are still highly comfortable for long distance travelling.

Visiting factories around the world to witness the processes involved in manufacturing the biggest, fastest and most powerful machines