1 point for the episode/main plot.
1 point for the joke/scene.
That means the sinister twin was and always has been, points.
Mr Lisa Goes to Washington : the city of Washington was built on a stagnant swamp some 200 years ago, and very little has changed. It stank then and it stinks now, only today it is the fetid stench of corruption that hangs in the air.
Lisa wins a Reader’s Digest essay contest and the family goes to the finals of the contest in DC. She sees a congressman make a deal to shaft the environment and has a change of heart about the focus of her speech.
Special mention: Speech called “USA, A-OK” and Homer telling the Reader’s Digest rep that he really loves their magazine, esp the section about “How to improve your vocabulary. That thing is really, really, really… good.”