At the time, Sports Night was one of my favorite shows, and I was furious when it got canceled.  So when I was reading this article in the NY Times (Via Ann Althouse), I was instantly reminded of this dialogue:

Natalie: Good news.
Dana: What?
Natalie: Pluto's still a planet.
Sally: It was touch and go there for a while?
Natalie: Don't underestimate Pluto. Pluto doesn't know the word quit.

Sadly, despite the best efforts of scientists to gerrymander the definition of a planet to include our icy friend, Pluto may be fighting a lost cause:

"I think that today can go down as the 'day we lost Pluto,'" said Jay Pasachoff of Williams College in Williamstown, Mass., in an e-mail message from Prague.

Under fire from other astronomers and the public, a committee appointed by the International Astronomical Union revised and then revised again a definition proposed last week that would have expanded the number of official planets to 12, locking in Pluto as well as the newly discovered Xena in the outer solar system, as well as the asteroid Ceres and Pluto's moon Charon.
...
The bottom line, said the Harvard astronomer Owen Gingerich, chairman of the Planet Definition Committee of the union, is that in the new definition, "Pluto is not a planet."

And in other canceled show news... Stargate SG-1 looks to have bit the big one. Sci-Fi announced that they won't renew show after Season 10 is over.  It's the longest running Sci-Fi show on television, but I wish it would have run longer.  It is one of the few shows I still watch on TV.