Quest +1

The miraculous feats of engineering that underpin our lives, from the most basic of everyday objects to the biggest and most complex. This episode focuses on crash helmets, rubber, and wave piercing.

A look at how a classic British bike is being rebooted in India, how radiation is used to beat art fraud, and the amazing scale and technology inside Europe's largest dairy plant.

Drew seeks out a combination of knowledge and experience when he visits four family businesses. He discovers an exciting array of items to sell on.

Drew indulges his Georgian obsession in Lincoln, where he falls for a Regency wine cooler. And a bungalow near Stockport hides a vast collection.

Ruth's nightmares materialise in the form of woodworm-infested candlesticks. Plus, leather expert Martin rescues a pair of 100-year-old clown shoes.

Kitchen knives, mannequins, socks and hypodermic needles: more items are put under the microscope to find out how they were made.

Electric panels, kites and toothbrushes: more items are put under the microscope to find out how they were made.