Tyrian Purple, more than just the name of a character from Game of Thrones -Part 1

Tyrian isn't just the name of a character from game of thrones. It's also the name of a dye: Tyrian purple. 

What’s tyrian purple? And why do we need a whole episode on it? Well, because it’s the oldest, most famous, most expensive, most royal, most vibrant and possibly also the most foul smelling dye in the world. So this episode has a lot to live up to.