October 5, 2025 How Did They Build That? “Floating Parks & Upcycled Towers” S4E10 October 5 2025 on Smithsonian
September 28, 2025 How Did They Build That? “Super Stadiums & Extraordinary Elevators” S4E9 September 28 2025 on Smithsonian
September 21, 2025 How Did They Build That? “Facelifts & Scaffolds” S4E8 September 21 2025 on Smithsonian
September 14, 2025 How Did They Build That? “Summit & Submerge” S4E7 September 14 2025 on Smithsonian
September 7, 2025 How Did They Build That? “Shipyards & Slender Builds” S4E6 September 7 2025 on Smithsonian
August 17, 2025 How Did They Build That? “High Waters & Harsh Winds” S4E4 August 17 2025 on Smithsonian
