Megafactories, or Ultimate Factories as the show is known in the United States, is an American documentary television series created for the National Geographic Channel. This enormously successful series shows viewers how extraordinary factories from all over the world work. Each episode focuses on the inner workings of an iconic factory, for example those where Harley-Davidson, Budweiser or Ferrari, and the machines and manpower behind the processes. One of the main reasons for the success of Megafactories on TV is the understandable and comprenhensive way in which complex production processes of everyday products and designs are explained and illustrated during the show. Megafactories is narrated by the American actor and voice actor Christopher Cook, who also narrates for shows like The Indestructibles and National Geographic Channel's Inside.