"We're in the middle of an episode of 'Walker, Texas Ranger'."
Unlike all those pop culture references from last week's 'Supernatural', Sorkin left no wiggle room with the mention of the Chuck Norris show. He had to beat the audience over the head with the fact that 'Walker, Texas Ranger' IS A TV SHOW!!!!
This thing is, I don't think he was insulting the middle of the road, heartland America audience - as he seems to be doing with every other aspect of 'Studio 60'.
No, this time I think he didn't believe his dream audience of "intelligentsia" and the "cognoscentii" have never even heard of the martial arts Western before.
So, this is basically a true Zonk. We can only assume that some TV network decided to buy the rights to the life story of Cordell Walker so that they could make a TV show about him; in much the same way as was done with 'Serpico' and 'Toma' in the Real World. That would be the only way to disperse this Zonk.......