The Limit
Season 1 • Episode 3: Trickiest Tunnel • Watch with subtitles
Episode 3: Trickiest Tunnel
November 28, 1995 • 30 min
Hugh Doherty has spent a lifetime tunnelling underground, from the Clyde River Tunnel to the Hong Kong Mass Transit System. But now he is facing his biggest challenge yet - to build a new tube line under the heart of London, in record time.
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