Jimmy discovers that there's more to traditionally-matured cheese than meets the eye, thanks to a microorganism that helps give the likes of pecorino their distinctive hard rinds.
Matt meets a team of researchers to examine why re-heating rice can make you ill, and discovers what makes the pre-cooked rice stocked in supermarkets safe to eat.
Meanwhile, Kate heads to Malaysia to find out how vanilla is grown and how vanilla extract is produced.
