Season 4 Episodes8
Cast1

Julian Barratt
Narrator
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An expert team of engineers are using cutting-edge tech and the latest construction methods to build Los Angeles's biggest engineering project ever: a series of brand-new subway lines in durable, earthquake-proof tunnels.

Julian Barratt
Narrator
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"L.A. Mega Rail" is episode 2 of Building Giants season 4. It aired on May 13, 2020.