Air date: 2017-05-22

Runtime: 60 min

Linda and her team must battle fault lines that threaten the site with flooding, race to build access tunnels to alleviate pressure on a congested construction site, and piece together a giant geometric jigsaw that will form a station entrance.

Air date: 2017-05-29

Runtime: 60 min

Engineers must construct and fit out a new station at Paddington, erect a 130m long great glass canopy to soar above the structure, and plug directly into Brunel's original station.