As the seasons progress, the IQs drop. Welcome to WatchMojo.com, and today we’re counting down our picks for the top ten TV characters who got dumber. For this list, we’ll be looking at those television characters who became progressively dumber throughout the series’ run. These are the characters who began the show as somewhat aloof and goofy and a little thick, but as the series continued, have steadily become less and less intelligent.