How It's Made: Season 4
This season started on January 4, 2004. The table lists episodes with recorded air dates up to September 28, 2026.
| Ep | Title and air date | My place |
|---|---|---|
| 1 | Plastic Bottles and Jars, Mail, Eggs, Handcrafted Wooden Pens · 21 min | |
| 2 | Plastic Injection Moulds, Automotive Oil Filters, Filing Cabinets, Blown Glass · 21 min | |
| 3 | High-Precision Cutting Tools, Stained Glass, Semi-Trailers, Recorders · 21 min | |
| 4 | Conga Drums, Metal Plating, Buttons · 21 min | |
| 5 | Grinding Wheels, Compost, Window Blinds, Milk · 21 min | |
| 6 | Brushes and Push Brooms, Blackboards, Smoked Salmon, Zippers · 21 min | |
| 7 | 3D Commercial Signs, Hardwood Floors, Corrugated Polyethylene Pipe, Mattresses · 21 min | |
| 8 | Ceramic Tiles, Nuts, Steel Forgings, Skateboards · 21 min | |
| 9 | Car Engines, Flour, Recliners, Envelopes · 21 min | |
| 10 | Plastic Cups and Cutlery, Special Effects Makeup, Gold, Harps · 21 min | |
| 11 | Countertop Laminate, Frozen Treats, Children's Building Blocks, Detergents · 21 min | |
| 12 | Architectural Moldings, Pulleys, Industrial Rubber Hose, Sheet Vinyl Flooring · 21 min | |
| 13 | Putty Knives, Garage Doors, Electric Motors, Wool · 21 min |
