How Do They Do It? Season 4

E1: Forest Fires, Car Exhaust, Space Station

Go beneath the surface to understand forest fires, car exhaust and the space station.

E2: Family Car, Titanium, Letter

How a spacesuit keeps an astronaut alive, the diesel engines that power the world's biggest ships, and the manufacturing processes behind the famous neon signs which cover Las Vegas

E3: Nuclear Sub, Crash Test Dummies, Fruit and Vegetables

Secrets behind nuclear submarines; crash-test dummies; growing fruits and vegetables.

E4: Land Mines, Air Boats, Warehouses

The world's largest land-mining machine; how airboats are built; warehouse for car parts.

E5: Black Boxes, Steam Turbine, Racing Car

How black boxes survive an airplane crash; transporting giant steam turbines; making fireproof suits for race-car drivers.

E6: Jet Engine, Weapons, Telescope

The design and manufacturing of large jet engines; non-lethal weapons that stun without killing; the world's largest telescope.