Impossible Engineering - Season 7 Episode 2 World's Toughest Tunnels (London's Super Sewer)
A team of engineers are overhauling London's underground infrastructure to build a world-class sewer system. Using cutting-edge tech and the latest construction methods, they work to transform a centuries-old network into a modern-day masterpiece.
- Genre: Documentary
- Studio: Science
- Keyword: engineering
- Cast: Mike Bratton
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