One of the miracles of any good television show is that it even works at all. First consider the countless people working across departments and disciplines needed to make a single episode happen; and then consider that they all have to do it anywhere between eight and 20-ish times a year, and that the result has to make sense to millions of people who cannot wait to be unimpressed. There are a lot of places to mess up! And yet we hear about so few mistakes. Which is why it’s a...