Season 4

01 City of Ice Episode 16th May 2020 Engineers race to build a city made of snow and ice in a record-breaking 15 days, and to accomplish this herculean task, they use cutting-edge tech and the latest construction methods to turn 110,000 tons of ice into an extraordinary super city. 02 L.A. Mega Rail Episode 213th May 2020 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. 03 Underground Mega Highway Episode 320th May 2020 An expert team of engineers use hi-tech explosions and state-of-the-art drilling rigs to tear through solid granite and build an 11-mile underground tunnel, one of the longest in the world. 04 Mega Ice Ship Episode 427th May 2020 The world's best shipbuilders join forces to build a state-of-the-art ship that comes equipped with two submarines, and using cutting-edge engineering, it can brave the Arctic Ocean's worst winters and deadliest seas. 05 Earthquake Proof Mega Bridge Episode 53rd June 2020 An expert team of engineers use the latest advances in construction and design to battle deadly earthquakes, intense heat, and punishing deadlines and build a 3,500-long bridge in Los Angeles that's tough enough to brave the world's worst disasters. 06 High-Speed Train Episode 617th June 2020 An expert team of engineers use the latest advances in high-speed technology to build an army of the fastest and most advanced trains in the world; special access into the construction process reveals these record-setting trains' technological secrets. 07 Monster Roller Coaster Episode 724th June 2020 Expert engineering and cutting-edge technology come together to build one of the world's wildest roller coasters, and special behind-the-scenes access reveals how new innovations make this high-speed thrill ride possible. 08 Cruise Ship of the Future Episode 81st July 2020 One of the world's largest and most advanced cruise ships must brave some of the roughest seas on earth, and using expert engineering and the latest tech, its crew relies on cutting-edge innovations to operate this 170,000 ton vessel safely and speedily.