I think the babysitter one is the best one there is - "Homer Badman". I used it for an assignment earlier in the year and have tonnes of notes on it. It's good because it talks about the way that the media misrepresents the truth, and you can talk about the re-enactments, and the shonky editing, etc etc.
I was trying to think of other ones though. "How about Springfield Gets a Monorail"? You could talk about the way that the monorail guy manipulates the town at the meeting..? I don't really remember anything other than that scene, though.
If I come up with anything else, though, I'll let you know.