The importance of a great TV show theme song is greatly underrated.  Some are so classic, it's like playing "Name that Tune."  It takes only a couple of notes and you know exactly what show you're about to watch.  Some theme songs become iconic symbols of the generation that gathers around the ol' boob tube on a weekly basis. (Think FRIENDS, Cheers, Teenage Mutant Ninja Turtles)

How many of these can you name (without cheating!) and what is your favorite TV theme song?