All Episode in Season 12

1. Logging, Tiles, Jaffa Cakes 2. Heavy-Lift Aircraft, Hunting Boots, Bananas 3. Monorail, Royal Copenhagen Porcelain, New York Cupcakes 4. Wine, Goretex Extreme Weather Clothing 5. Screws, Marmalade, Printed Dresses 6. Road Rollers, Canned Bread, Vertu Phones 7. Tinned Grapefruit, Snow Machines, Conveyor Belts 8. Harp Strings, Roof Windows, Belgian Waffles 9. AGA Cookers, Incense Sticks, Jenever 10. Robo-farm, Log Stacker, Piano Moving 11. Bamboo Scaffolding, Strontium 12. Espadrilles, Prefabricated Houses, Underground Storage 13. Macadamia Nuts, Tap Water, Crowd Barriers 14. High Rise Construction, Dr. Marten Boots, Cooking Pans 15. Sitar, Biltong, Bulldozers 16. Fedoras, Cement, Frozen Peas 17. Mohair, Quadski, Harp 18. Redbush Tea, Luggage Handling, Hairbrushes 19. Credit Cards, Indian Lunch Deliveries, Boat Lift 20. Power Tunnel, Pizza Ovens, Playhouses

Season List

How Do They Do It? Specials How Do They Do It? Season 1 How Do They Do It? Season 2 How Do They Do It? Season 3 How Do They Do It? Season 4 How Do They Do It? Season 5 How Do They Do It? Season 6 How Do They Do It? Season 7 How Do They Do It? Season 8 How Do They Do It? Season 9 How Do They Do It? Season 10 How Do They Do It? Season 11 How Do They Do It? Season 12 How Do They Do It? Season 13 How Do They Do It? Season 14 How Do They Do It? Season 15 How Do They Do It? Season 16 How Do They Do It? Season 17