1. Urban Heart Surgery

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. 16 July 2014. 60 min

A look at London's Crossrail, which requires building 42 km of tunnels under the city

2. Tunnels Under the Thames

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. 23 July 2014. 60 min

Engineers building Crossrail battle to rebuild a Victorian tunnel under the Royal Docks.

3. Platforms and Plague Pits

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. 30 July 2014. 60 min

The engineers building Crossrail race to build ten new train stations across London.