User blog comment:Charlaux/Barts Aging/@comment-3419278-20111230001139

There's two that I can think of. "Future-Drama", where Bart and Lisa see their future using Professor Frinks' Time Window Thing, where Bart is said to meet his true love at the age of 83, though it is never shown, and he is actually eighteen in this episode, and "Holidays of Future Passed", where Bart is forty, Lisa is thirty-eight, and Maggie is thirty; this episode is the latest in full future episodes. However, there is another episode; "Itchy & Scratchy: The Movie", which shows Bart at the end with Homer, forty in the future. This is actually the latest that is seen, but this is shown only at the end of the episode.