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Impossible Engineering - Season 7 Episode 2 World's Toughest Tunnels

Trailer
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.

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First Air Date: Apr 13, 2015

Last Air date: Sep 01, 2021

Season: 10 Season

Episode: 82 Episode

Runtime: 42 minutes

IMDb: 6.67/10 by 15.00 users

Popularity: 19.874

Language: English

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