Dirty Great Machines S1E1: Titans of Tunneling
- Aired: 2015-08-03
- Time: 22:00:00
- Runtime: 60 minutes
Overview
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.