The Simpsons did a 24 take-off that featured a cameo from none other than Keifer Sutherland. The trademark split-screens from 24 made the episode interesting to watch.
Bart, cast in the role of the rebellious agent who is the only one who can get results, must foil a plan by school bullies to stink bomb the school bake sale with a bomb made from rank old yogurt (it killed a hamster and made poor Ralph twitch like a Chihuahua). The Halloween special also featured Simpsonized takes on War of the Worlds and Mr. and Mrs. Smith. I've always liked that the show makes a lot of pop culture references but there can be too much of a good thing. I don't think the Simpson's has reached their limit yet; do you?