Where to stream How Did They Build That?

Season 4

How Did They Build That?

Season released 27th Jul, 2025.

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Prime Video

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Season 4 Episodes

S04 Episode 1

Space Stations & Super Inventions

Lives are on the line creating the International Space Station, a scientific marvel a decade in the making, that changes the way we look at the world.

Sun, 27 Jul 2025

S04 Episode 2

Medals & Marinas

A floating museum honors military heroes in Texas. A sky-park casino balances on six towers. And an office is carved out to protect NYC's High Line.

Sun, 3 Aug 2025

S04 Episode 3

Speedcore & Steambend

A railway-spanning library mimics the clouds. A speed-core skyscraper is built in record time. And a world first bridge inspired by a child's toy.

Sun, 10 Aug 2025

S04 Episode 4

High Waters & Harsh Winds

Apartments hanging 164 feet above the water defy gravity in Amsterdam. A trio of towers shimmer on Chicago's skyline, and museum design is revolutionized in Paris.

Sun, 17 Aug 2025

S04 Episode 5

Ecobuilds & Earthquakes

An airport gets a 9 acre roof without stopping flights. A museum is buried in the desert to keep it cool. And building San Fran's most hated tower.

Sun, 24 Aug 2025

S04 Episode 6

Shipyards & Slender Builds

A 284ft timber tower tests fire safety limits. An old crane tracks is reborn as sleek glass offices. And 28 apartments are stacked on a 21ft plot.

Sun, 7 Sep 2025

S04 Episode 7

Summit & Submerge

A mountain-top centre defies extreme altitude. A stunning museum is sunk into an old dock. And a 600ft tower with floating gardens rises in Singapore.

Sun, 14 Sep 2025

S04 Episode 8

Facelifts & Scaffolds

A museum bends 1,100 glass tubes into a bold facade. A vast atrium rises where the Berlin Wall fell, and a NJ bridge is raised 65ft for huge tankers.

Sun, 21 Sep 2025

S04 Episode 9

Super Stadiums & Extraordinary Elevators

A 70,000 seat stadium defies seismic forces in LA. Malta's 33 story tower twists around old vaults. And an 807ft elevator test tower spirals skywards.

Sun, 28 Sep 2025

S04 Episode 10

Floating Parks & Upcycled Towers

San Francisco's MOMA dramatically triples in size. A skyscraper transforms by smart demolition. And 5 acres of parkland floats above Dallas traffic.

Sun, 5 Oct 2025

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