16. The Who - (S12 E2 - "A Tale Of Two Springfields")
Springfield is torn in two as a wall divides the rich and poor (hi, post-war Germany reference!) and the only answer to reunite the city is through ROCK AND ROLLLLLL! The Who (which is what younger people were asking when it first aired) was another classic old-fogey rock and roll group which again emphasized the demographic the Simpsons were aimed at. The splitting of Springfield because of a new area code is defeated by the suggestion of speed dialing and the wall that Homer built is shattered by the opening refrain of CSI's theme song.