After over a quarter-century on the air, Fox's hit animated show The Simpsons will be shaking things when it returns this fall for Season 27. Earlier this week, showrunner Al Jean said that the nefarious Sideshow Bob will get to kill Bart Simpson in the annual Treehouse of Horror Halloween episode, but today we have an even more surprising revelation. Al Jean says that Homer and Marge Simpson will be getting legally separated in The Simpsons Season 27 premiere, and that Homer will fall for his pharmacist, voiced by Girls creator/star Lena Dunham.

"In the premiere, it's discovered after all the years Homer has narcolepsy and it's an incredible strain on the marriage. Homer and Marge legally separate, and Homer falls in love with his pharmacist, who's voiced by Lena Dunham. We'll have cameos from the other women from Girls."

Al Jean also added that Saturday Night Live and new Ghostbusters star Kate McKinnon will play a homeless woman with an incredible voice in another episode, and that they will also have an episode based on Richard Linklater's hit drama Boyhood.

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"We have an episode coming up where Lisa befriends a homeless woman who turns out to be an incredible singer. The woman's voiced by Kate McKinnon, but the singing is done by Natalie Maines. And we have an episode based on the film Boyhood. It's a flashback/flashforward about Bart. We go to various points in his life and his life to come which I think came out really well."

The showrunner also teased details about two episodes he wrote himself in The Simpsons Season 27, one which is a Christmas episode and another that examines the home planet of aliens Kang and Kodos.

"One is a Christmas show. I always feel sorry for people who have to work on Christmas eve or aren't home. Homer stays at Moe's too late, so Marge kicks him out of the house. He's wandering Springfield meeting with the different lonely people on Christmas Eve, and he meets Ned Flanders, who starts to cry about losing Edna Krapappel. The other was a completely opposite tone. Jim (Burrows) said why don't we do a show about Kang and Kodos home planet. We did every sci-fi (reference) we could."

The Simpsons has already been renewed through Season 28, which means the 2016-2017 season will fall during the Presidential election. Al Jean added that Homer Simpson will get to vote once again. While the showrunner isn't sure who Homer will be voting for, he teased "whatever he wants it's not going to happen." What do you think about these new details regarding The Simpsons Season 27?