Waverly Hills 9-0-2-1-D’Oh is the nineteenth episode of Season 20. It aired on May 3, 2009. The episode was written by J. Stewart Burns and directed by Michael Polcino.
When Marge discovers the poor teaching conditions at Springfield Elementary, she gets Homer to rent an apartment in the Waverly Hills area so Bart and Lisa can attend school there, but Lisa’s lack of knowledge about singer Alaska Nebraska makes her as unpopular as ever, until Bart spreads a rumor that Lisa and Alaska are best friends – which comes back to haunt Lisa when her new friends want backstage passes to her upcoming concert; Homer has to stay in his shabby apartment until the school’s inspector pays a surprise visit to make sure they actually live in the area, but he gets to like it – until he invites Marge to move in with him.