The Nielsen ratings might not have as much power as they once held, but they still can decide the fate of your favorite TV show. If nobody's watching, it could be canceled. That's always been true. But what's also always been true is that the Nielsen data-gathering procedure is a little opaque and hard to understand.

Don't worry, though, because we've got your back. This week, Todd and guest Joe Adalian, of New York Magazine's Vulture, take you through how the Nielsens work, how they decide which viewers to count for their statistical sample, and just how much networks still pay attention to their ratings in an era when all viewership has plummeted. (The answer is less than they used to but still more than you'd probably want them to if your favorite show has poor ratings.)

Joe will also take you through the world of streaming services and how their refusal to release viewership numbers is and isn't changing the TV game, and he'll pull out some of his favorite ratings tidbits. Joe is one of the sharpest analysts of the industry, so if you just want to understand how the TV business works, this interview is a great place to start. And if you think you already know, you almost certainly don't know as much as Joe.