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4:00 AM: Richard Hammond's Big (S1 E5) (S1) | Discovery Science | 6/28 2025 Discovery Science
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Richard Hammond's Big « at 4:00 AM on Discovery Science

Episode 5

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Episode: World's Longest Railway Tunnel

Richard ventures 2km beneath the Alps into the world's longest underground railway connection, the Brenner Base Tunnel, riding some giant machines!

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