When did Building The Ultimate Season 1 Episode 4 air?
Building The Ultimate Season 1 Episode 4 aired on August 19, 2020.

Reveals the engineering secrets built into six modern wonders - from Europe's fastest passenger train and largest luxury cruise ship, to North America's toughest bridge and the world's mightiest heavy-lift aircraft.

Charting the 650-kilometre, cross-country journey of Europe's fastest passenger train, we showcase the innovative technology that keeps it on the rails through tunnels and around tight bends at 300 kilometres per hour.
Direct answers for episode-level questions and details.
Building The Ultimate Season 1 Episode 4 aired on August 19, 2020.
Runtime information for this episode is not available yet.
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