Season 4

Episode 1

S4 · E1 · 11/04/2007 · 22 min

Forest Fires, Car Exhaust, Space Station

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

Episode 2

S4 · E2 · 11/04/2007 · 22 min

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

Episode 3

S4 · E3 · 18/04/2007 · 22 min

Nuclear Sub, Crash Test Dummies, Fruit and Vegetables

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

Episode 4

S4 · E4 · 18/04/2007 · 22 min

Land Mines, Air Boats, Warehouses

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

Episode 5

S4 · E5 · 25/04/2007 · 22 min

Black Boxes, Steam Turbine, Racing Car

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

Episode 6

S4 · E6 · 25/04/2007 · 22 min

Jet Engine, Weapons, Telescope

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