MADRID: Both a museum and the official palace of the Spanish royal family, the Palacio Real features armour, artworks and treasures that were once the private possessions of Spain’s kings and queens.

In this episode, we discover that Spain reached its height of glory not through the acquisition of silver and gold, but because of the unique properties of a third element. We investigate how a famous swordsman bested 17 challengers, then examine the inner workings of a clock that was said to have been powered by witchcraft. We probe why a shield of leather can be better than steel, then meet a Gypsy who reveals how to separate Flamenco that is strictly for tourists from Flamenco that is real. And finally, we meet a modern king of Spain who outfoxed a Fascist dictator.