This is one of only two A+s from this season. The two plots didn't seem connected, but Bart's nerdiness was a nice tie-in to Homer's realization of how strange his family is. I think this is very well one of the season's funniest, but it also focuses on a rarely seen side of Homer. When I saw this, I kept thinking of it as a retread of Colonel Homer, but now I realize that this episode goes deeper into Homer's mind. In Colonel Homer, he was oblivious, but here, he is the only one who is aware of the situation at hand, and I can't think of any episode in which Homer has been so heavily focused on. Mirkin also rarely brings out really emotional moments, but Homer's scene in the hotel was definitely one of the most touching scenes ever. And when that was complemented perfectly by Homer's 'Margie' song, it just gave me a really good feeling inside. There's still more excellent things going for the episode, as it brings back Capital City, gives Charlie a nice moment, and satirizes the fossil fuel industry. And Bart's subplot was hilarious. I don't think I have ever laughed harder at a 'exageration of childhood' joke, than at the hidden cave in the lockers. Brilliant episode.