When a TV producer/production company produces a new TV show, how do they get a custom theme song for it? Who do they commission? How do they commission it? Do they contact underground/unsigned artists? Big names? Record labels? Companies that specialize in producing theme songs? License music that already exists? Do you know of anyone who had to commission such a thing? What did they do, if so? Have you ever had to? What did you do, if so?