Dogs and Cats Living Together! Have you ever wondered just who those people are who decide what the United States watches on television? Well, wonder no longer--you're talking to one. Since Thursday, our household has been a Nielsen Family.

We're not a permanent N.F.; it only lasts 'til the end of sweeps week, that is, Wednesday. (Didn't you wonder why all the season finales are happening this week?)

I'll have a more detailed explication of the process soon. In the meantime, rest assured that at least 160,000 households watched this evening's season finale of "Buffy the Vampire Slayer." Which is to say, we did.