If you grew up watching Smart Guy, you know that it wasn't just any other sitcom. Sure, it was about a high school kid learning life lessons and getting into hijinks. But Smart Guy had an added twist: that high school student was a 10-year-old, who was smarter than most of his teachers.Believe it or not, Smart Guy first aired way back in 1997. So what have the cast been up to since then?1. Floyd Henderson - John Marshall JonesTJ's dad was a roofer who struggled to understand all the science that his son was constantly talking about,