Battery Power, Chocolate, Toothbrushes
How do they make toothbrushes; how do they produce millions of car batteries; and how are cacao beans transformed into chocolate?
More from Season 7
Episode 1
Underground World, Gunmakers
Head underground into America's largest mine to find out how lead is extracted. And how do they manufacture and test made-to-measure shotguns?
Episode 2
Diggers, Taste Of The Orient, Into The Void
How do they operate the world's most versatile construction machines? Plus, how do they maintain the Willis Tower Skydeck in Chicago?
Episode 3
Peanut Butter, Breaking Point
How are peanuts harvested, roasted and transformed into peanut butter; and how are domestic appliances tested?
Episode 4
Smooth As Marble, Hot Stuff, Umbrellas
How do they mine marble for Washington's monuments; how do they make Tabasco Sauce; and how do they produce storm proof umbrellas?
Episode 5
Tales From The Black Stuff, Silk, In The Can
How do they make Irish stout and how do they use silkworms to create gunpowder bags and clothes? Plus, how do they put soup into cans?
Episode 6
Fire Extinguishers, Cruise Liner
How are phosphates used to put out fires; and how are cruise liners fuelled up and stocked with supplies before a voyage?
