13 million is a really big number.
There are usually about 500 watchers on Mt.Gox live. Let's say that the total active Bitcoin traders are ten times that (I'm just guessing). 5000/13000000 is 0.04%.
Conclusion: if 0.04% of the people watching The Good Wife are interested enough to buy some bitcoins, the active traders could double.
As I say; I'm only guessing.
I'm guessing viewership was closer to 10 million... they've lost viewers to the NFL championship games last week and probably this week. We should know when the numbers are published Tuesday. Who knows, maybe forum users picked up the slack.