Thursday Thirteen #74: Shows That Never Jumped the Shark

In November of 2007, I wrote a Thursday Thirteen in which I listed TV shows that "jumped the shark". As you may know, the term "jump the shark" refers to the point in a series' run when it begins its slide into mediocrity or worse. For this week's T13, I'm flipping the script and listing TV series that I think never jumped. I can watch the following 13 shows at any point in their run and be