
Factories are evolving to become faster, greener and more innovative than ever before. Cameras go behind closed doors to reveal the smartest and greenest factories on earth, making products of astonishing complexity, innovation and precision.

A look at McLaren's UK supercar production, the German factory making 500,000 Faber-Castell pencils a day, US STIHL chainsaws, and Japan's Shoda Shoyu soy sauce.

In this episode, we see the origins of Tesla batteries, Yamaha grand pianos, Siemens Gamesa wind turbine blades and Sandvik's boring bar.

This edition explores Nasa's Space Launch System; Heinz baked beans; one of the world's most successful chocolate bars - the KitKat; and the Victorinox Swiss Army Knife.

This episode reveals the workings of car factory VW Chattanooga, nitrogen-fresh Illy coffee, classic yellow JCB backhoe loaders and robot-made Strandberg guitars.

This episode reveals how cars, chips, toys and toilets are made, as we go behind the scenes at Maserati, Frito-Lay, Bandai and Armitage Shanks.

This episode reveals the inner workings of UPS's delivery service, Brompton's folding bikes, Rold's locking washing machines and Nongshim's instant noodles.