第 4 季 共 13 集
播出时间：2005年1月5日
第 1 集 Plastic Bottles and Jars, Mail, Eggs, Handcrafted Wooden Pens
播出时间：2005年1月5日
This episode demonstrates the production processes for plastic bottles & jars, mail, eggs, handcrafted wooden pens, and shows how each is made.
第 2 集 Plastic Injection Moulds, Automotive Oil Filters, Filing Cabinets, Blown Glass
播出时间：2005年1月12日
This episode demonstrates the production processes for plastic injection moulds, automotive oil filters, filing cabinets, blown glass, and shows how each is made.
第 3 集 High-Precision Cutting Tools, Stained Glass, Semi-Trailers, Recorders
播出时间：2005年1月19日
This episode demonstrates the production processes for high-precision cutting tools, stained glass, semi-trailers, recorders, and shows how each is made.
第 4 集 Conga Drums, Metal Plating, Buttons
播出时间：2005年1月26日
This episode demonstrates the production processes for conga drums, metal plating, buttons, and shows how each is made.
第 5 集 Grinding Wheels, Compost, Window Blinds, Milk
播出时间：2005年2月2日
This episode demonstrates the production processes for grinding wheels, compost, window blinds, milk, and shows how each is made.
第 6 集 Brushes and Push Brooms, Blackboards, Smoked Salmon, Zippers
播出时间：2005年2月9日
This episode demonstrates the production processes for brushes & push brooms, blackboards, smoked salmon and zippers, and shows how each is made.
第 7 集 3D Commercial Signs, Hardwood Floors, Corrugated Polyethylene Pipe, Mattresses
播出时间：2005年2月16日
This episode demonstrates the production processes for 3D commercial signs, hardwood floors, corrugated polyethylene pipe and mattresses, and shows how each is made.
第 8 集 Ceramic Tiles, Nuts, Steel Forgings, Skateboards
播出时间：2005年2月23日
This episode demonstrates the production processes for ceramic tiles, nuts, steel forgings and skateboards, and shows how each is made.
第 9 集 Car Engines, Flour, Recliners, Envelopes
播出时间：2005年3月2日
This episode demonstrates the production processes for car engines, flour, recliners and envelopes, and shows how each is made.
第 10 集 Plastic Cups and Cutlery, Special Effects Makeup, Gold, Harps
播出时间：2005年3月9日
This episode demonstrates the production processes for plastic cups & cutlery, special effects makeup, gold and harps, and shows how each is made.
第 11 集 Countertop Laminate, Frozen Treats, Children's Building Blocks, Detergents
播出时间：2005年3月16日
This episode demonstrates the production processes for countertop laminate, frozen treats, children's building blocks and detergents, and shows how each is made.
第 12 集 Architectural Moldings, Pulleys, Industrial Rubber Hose, Sheet Vinyl Flooring
播出时间：2005年3月23日
This episode demonstrates the production processes for architectural moldings, pulleys, industrial rubber hose and sheet vinyl flooring, and shows how each is made.
第 13 集 Putty Knives, Garage Doors, Electric Motors, Wool
播出时间：2005年3月30日
This episode demonstrates the production processes for putty knives, garage doors, electric motors and wool, and shows how each is made.
