The quiz comes from Mental Floss. There are 15 themes ranging from the ones that you'd be ashamed to miss to some relative obscurities. I only had trouble with two of them,and one was a show which I have never seen. It could have been a lot harder with some themes from more obscure shows. I mean who remembers the theme to, I don't know Nurses, which was part of a block with Empty Nest, and Golden Girls.