Matt visits the town of Tequila, on the trail of Mexico's national drink. Where does the idea of a worm in your tequila come from? As he attempts to find out, Matt visits fields of exotic blue plants and one of Mexico's leading distilleries, and gets a stern ticking off from a local as it turns out he's been drinking it wrong all these years! Meanwhile, carp is the festive dish of choice for Poles living in the UK, but when Jimmy tries a fresh carp straight from the water it tastes of mud. So how do the Poles transform this muddy mouthful into a much-loved delicacy? Jimmy heads to Poland to find out. And Kate visits Spain to find out what the difference is between tangerines, mandarins, satsumas and clementines.