Titans of Tunneling
S01E01 - Airdate: 2015-08-03
Runtime: 60 min
Documentary series revealing the demon diggers burrowing below our cities. In London, a tunnel boring machine faces immense challenges as it takes on Britain's deepest-ever tunnel. Meanwhile in Mexico, a giant mechanical worm makes the earth move just metres beneath the city's soaring skyscrapers.
Episode details and rating from TVmaze.