Season 4

01 Forest Fires, Car Exhaust, Space Station Episode 111th April 2007 Go beneath the surface to understand forest fires, car exhaust and the space station. 02 Family Car, Titanium, Letter Episode 211th April 2007 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 03 Nuclear Sub, Crash Test Dummies, Fruit and Vegetables Episode 318th April 2007 Secrets behind nuclear submarines; crash-test dummies; growing fruits and vegetables. 04 Land Mines, Air Boats, Warehouses Episode 418th April 2007 The world's largest land-mining machine; how airboats are built; warehouse for car parts. 05 Black Boxes, Steam Turbine, Racing Car Episode 525th April 2007 How black boxes survive an airplane crash; transporting giant steam turbines; making fireproof suits for race-car drivers. 06 Jet Engine, Weapons, Telescope Episode 625th April 2007 The design and manufacturing of large jet engines; non-lethal weapons that stun without killing; the world's largest telescope.