- Richard Hammond goes behind-the-scenes of the world's longest underground railway connection to uncover how hi-tech equipment helps engineers blast through solid rock to create a cutting-edge train line over a mile beneath the earth's surface.
- First Aired: April 8, 2020 - 41 Minutes Runtime
Watch Richard Hammond's Big Season 1 Episode 8 - World's Greatest Tunnel
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Richard Hammond's Big, Season 1 Episode 8, is available to watch and stream on Motortrend. You can also buy, rent Richard Hammond's Big on demand at Amazon Prime, Philo, Amazon, Vudu, Science Channel, Sling, Google Play, iTunes online.