Season 9, Episode 1
After Barney drunkenly drives Homers car to New York, the Simpsons have to travel there to pick it back up. However, when they arrive the family split up and do some sightseeing whilst Homer has to attend to sorting out multiple parking tickets his vehicle has incurred.
There is a short sequence in the episode which was edited for TV after the 9/11 terrorist attacks which showed an argument between two rival workers in the World Trade Center towers. Fortunately the scene was restored for the DVD release.
See here for more details.
Notes & Screenshots: Lord Heath