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Season guide

How Do They Do It?: Season 9

20 episodes Premiered May 17, 2012 Updated Sep 29, 2026
Previously on How Do They Do It?

Season 9 Lore Primer

Key plot threads, lore context, and character stakes you need to remember before diving into this season.

  • ⚡ Directly follows the overarching narrative developments of How Do They Do It? Season 8.
  • ⚡ Faction dynamics and core character alliances shift under escalating external stakes.
  • ⚡ Crucial mysteries introduced previously reach key turning points and narrative reckonings.
  • ⚡ Sets up serialized story arcs that build directly toward the climactic season finale.
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Season 9 Episodes

Episode Guide

🛡️ SPOILER SHIELD

Season 9 Progress Shield

Future titles & synopses blurred. Tap "Reveal" on any card to peek.
Binge Efficiency Engine

Season 9: Filler vs. Essential Canon

Filter episodes by narrative weight. Focus on essential mytharc and skip standalone side quests.

15%
85%
Mytharc (3): Crucial lore & season climaxes
Core (17): Character development & subplots
Side Quest (0): Standalone / filler
S9·E1 Mytharc

Chewing Gum, Fish Hooks, Legoland

May 17, 2012 · 22 min

How do they transform rubber into chewing gum; how do they make fish hooks strong enough to catch a shark; and how are the models built at the world's largest...

S9·E2 Core

Leatherman, Formula 1, Glassware

Jul 12, 2012 · 22 min

How do they build Formula 1 racing cars; how do they make the Leatherman, America's best-selling multi-tool; and how do they create classic Finnish Aalto glassware?

S9·E4 Core

World In Miniature, Rhubarb

Jul 26, 2012 · 22 min

How do they build working miniature airports? How do they design houses to survive hurricanes? How is rhubarb cultivated in the dark?

S9·E5 Core

Almonds, Snowblower

Aug 2, 2012 · 22 min

How do billions of bees produce tonnes of California almonds? How do they clear the snow to keep Norway's planes in action? How are tricky stains removed?

S9·E6 Core

Fighter Plane, Trappist Beers, SUV

Jul 26, 2012 · 22 min

How is a modern fighter jet built? How do Belgium's Trappist monks make the world's finest beers? How do they build America's best performing SUV?

S9·E7 Core

Guacamole, Swamp Buggy

Aug 9, 2012 · 22 min

How do volcanoes help produce the world's best guacamole? How do they build trucks that can cross swamps? How do they make the world-famous Fiskars scissors?

S9·E8 Core

Suspension Bridge, Crossbows

Aug 23, 2012 · 22 min

How do they make steel cables strong enough to hold up a 50,000 tonne bridge; why do modern hunters use medieval weapons; and how do shops know which clothes sizes...

S9·E9 Core

Tennessee Whiskey, Nightvision

Aug 30, 2012 · 22 min

How do they make Tennessee whiskey the traditional Lincoln County way? How do night goggles work? How do the Finnish relax in 160-degree saunas?

S9·E10 Core

Vanilla, Anchors

Sep 6, 2012 · 22 min

How do they grow enough vanilla to make the world's favourite ice cream flavour? How are anchors for huge ships built? How are 12 million lighters made every year?

S9·E11 Core

Leather Footballs, Mussels

Sep 13, 2012 · 22 min

How do they craft footballs for the National Football League? How do they farm mussels? How do they design the ultimate fighter pilot's helmet?

S9·E12 Core

Scania Trucks, Miracle Forensics

Sep 20, 2012 · 22 min

How are powerful Scania trucks built? How do they use the world's biggest DNA database to solve crime? How is paraffin used to make Gouda cheese?

S9·E13 Core

Guitars, Rope Access

Sep 27, 2012 · 22 min

How do they make the finest classical guitars? How do they keep the blades turning on a wind turbine? How do they produce America's ultimate mowing machines?

S9·E14 Core

Liferafts, Mind Control

Oct 4, 2012 · 22 min

How can lifeboats hold up to 150 people? How can mind control techniques help golfers improve their shots? How do they make millions of celebratory stamps?

S9·E15 Core

Tequila, Steam-Powered Megacity

Oct 11, 2012 · 22 min

How do they produce tequila from cactus plants in Mexico? How does New York City run on steam? How do they produce soft ice cream?

S9·E16 Core

Stuntmen, Seabreacher, Amber

Oct 25, 2012 · 22 min

How stuntmen survive a day of being knocked down and beaten up; how they make a watercraft that can swim like a dolphin; how they mine precious amber.

S9·E17 Core

Tennis Balls, Surround Sound

Oct 25, 2012 · 22 min

How is NYC supplied with the finest steaks? How do they produce the ultimate surround sound home cinema systems?

S9·E18 Core

Rayon, Snuff, Cola

Nov 29, 2012 · 22 min

How is viscose transformed into clothing and cloth? How do they produce the world's favourite fizzy drinks? How do they make traditional English snuff?

S9·E19 Mytharc

Zubrowka, Aerial Cable Car

Dec 6, 2012 · 22 min

How do they build the world's most expensive cable cars? How is vodka produced from grass? How do social networks connect people around the world?

S9·E20 Mytharc

Skydiving Suits, Surströmming

Dec 13, 2012 · 22 min

How do skydiving suits work? How do they produce Surströmming, one of the world's smelliest foods? How do they transform weeds into walls?

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