 Due to the prominence of the World Trade Center in the plot , the episode was removed from syndication after the September 11 attacks . By 2006 , the episode had come back into syndication in some areas ; however , parts of the episode were often edited out . One previously such edited item is a scene of two men arguing across Tower 1 and Tower 2 , where a man from Tower 2 claims , " They stick all the jerks in Tower One " . Co @-@ executive producer Bill Oakley commented in retrospect that the line was " regrettable " . 
