S31 E1 • The Winter of Our Monetized Content

When a video goes viral of Bart and Homer fighting, they begin a journey as social media celebrities. Meanwhile, Lisa battles the school’s new industrialized detention system.

S31 E2 • Go Big or Go Homer

Homer is demoted to supervising interns, among whom is go-getter millennial Mike, a 35-year-old who asks Homer to be his mentor. However, when Homer inspires Mike to start a business of his own, the two find themselves being chased by the mob.

S31 E3 • The Fat Blue Line

When the wrong man is arrested for pickpocketing Springfield during the San Castellaneta street festival, Chief Wiggum sets out to catch the real criminal.

S31 E4 • Treehouse of Horror XXX

Horrors include a demon Maggie, a mission to rescue Milhouse from another dimension, dead-Homer’s spirit trying on some new bodies for size, and Selma finally finding love in an unlikely place.

S31 E5 • Gorillas on the Mast

After a trip to Aquatraz Water Park, Lisa becomes determined to set free Springfield's most vicious animals in captivity. Meanwhile, Homer fulfills a lifelong dream of buying a boat, and quickly realizes boat ownership sucks.

S31 E6 • Marge the Lumberjill

Marge becomes a competitive lumberjack and goes on a month-long retreat to Portland with her trainer, whom Homer fears will take his wife away from him.

S31 E7 • Livin' La Pura Vida

The Simpsons join other Springfield families on the Van Houtens’ annual trip to Costa Rica, where Homer befriends Patty’s new girlfriend and Lisa discovers how the Van Houtens are able to afford this trip every year.

S31 E8 • Thanksgiving of Horror

The Simpsons face various Thanksgiving nightmares, including the first Thanksgiving, an A.I. mishap and a dangerous space mission complicated by a sentient cranberry sauce.

S31 E9 • Todd, Todd, Why Hast Thou Forsaken Me?

Todd blames God for the death of his mother and rejects his faith, so Ned sends him to live with the Simpsons, hoping they can scare him into believing in God again.

S31 E10 • Bobby, It's Cold Outside

Sideshow Bob gets contracted as this year’s mall Santa. Meanwhile, someone is stealing all the Christmas packages off people’s front porches.

S31 E11 • Hail to the Teeth

Homer and Marge attend Artie Ziff’s wedding and become quite uncomfortable when they realize that his bride-to-be is a clone of Marge. Meanwhile, Lisa grapples with the misogynistic implications of the immediate popularity she receives after getting her new Invisalign braces.

S31 E12 • The Miseducation of Lisa Simpson

S31 E13 • Frinkcoin

S31 E14 • Bart the Bad Guy

S31 E15 • Screenless

S31 E16 • Better Off Ned

S31 E17 • Highway to Well

S31 E18 • The Incredible Lightness of Being a Baby

Cletus devient un magnat de l’hélium. Marge retrouve le bébé dont Maggie était tombé amoureuse.

S31 E19 • Warrin' Priests (1)

Le révérend Lovejoy enquête sur le passé d'un mystérieux nouveau prêtre qui est venu en ville et a secoué les choses à l'église.

S31 E20 • Warrin' Priests (2)

Dans le Michigan, le révérend Lovejoy découvre la raison pour laquelle Bode est parti et est venu à Springfield. Lorsque la congrégation apprend son crime, elle doit décider de bannir son nouveau prêtre.

S31 E21 • The Hateful Eight-Year-Olds

Lisa se fait une nouvelle amie qui aime les chevaux, mais elle devient membre d’un cercle de jeunes filles riches snobs. Pendant ce temps, Homer emmène Marge en croisière romantique.

S31 E22 • The Way of the Dog

Après que Petit Papa Noël ait mordu Marge, la famille explore son passé tragique...