John Lennon (October 9, 1940 – December 8, 1980) is a former member of The Beatles and is currently deceased.
His likeness appeared in "Treehouse of Horror XIX". He appears riding the Yellow Submarine when the stars that Homer killed are preparing to take their revenge on him. John appears saying "All we are saying...is let's eat some brains!"
In Ned Flanders's Beatles room there is soda named John Lemon.
In another episode Homer walks up next to a Waxwork of The Bed in for Peace 1969 John Lennon.
He is the only member of The Beatles that has never guest starred in the series.