The twenty-ninth season of the American animated sitcom The Simpsons aired on Fox from October 1, 2017 to May 20, 2018.

In a fantasy world, the Serfsons find Marge's mother Jacqueline slowly freezing into ice.

Homer is unable to find enough money for the amulet, so Lisa uses her abilities to turn lead into gold.

They realize that the dragon is their source of magic, but Lisa suggests creating a society based on science.

When Lisa keeps having nightmares, Homer and Marge send her to a therapy student because they cannot afford a therapist.

Later, a theater director wants to make a play based on the comic book, but focuses on the art style and not Lisa's character.

Meanwhile, Fat Tony asks Marge to redecorate a post office he acquired after seeing her decorate a room at Springfield Elementary.

However, she convinces him to shut it down by showing that his mother kept a letter from the pope in a mail box in the building.

In the twenty-eighth annual Simpsons Halloween special: Guest stars: Mario Batali as himself, Ben Daniels as a priest, Neil Gaiman as Snowball and William Friedkin as Dr. Kenneth Humphries An older Lisa is writing her college application essay to Harvard.

At a school talent show, Brendan and Nelson perform while Bart does a chemistry demonstration.

Brendan is disqualified for living outside of the school district, and Lisa is sad to see him leave.

Going to Springfield University, they learn that scholars believe that the original book is satire, but no one is truly convinced.

When a flight the Simpsons are on is diverted to New Orleans, Marge tells Homer to use the situation to help cheer up Lisa.

When the family fails to force them to make up, Homer reveals that he and Mona used to bake pies, and she gave him a box with the recipes.

When the Leftorium shuts down, Homer helps Ned get a job in human resources at the power plant.

When Grampa needs an operation, Lisa suggests they take him to Denmark so that he can benefit from its socialized medicine system.

Grampa reveals that he merely wanted to remove a tattoo of Mona, so he and a saddened Homer drink at a bar.

Guest stars for the season included Nikolaj Coster-Waldau, Rachel Bloom, Martin Short, Ben Daniels, Neil Gaiman, Valerie Harper, Norman Lear, Jon Lovitz, Ed Sheeran, Bill Hader, Cecily Strong, Kevin Pollak, J.K. Simmons, Daniel Radcliffe, and Jimmy O.

[24] This season also features Kelsey Grammer reprising his role as Sideshow Bob and Homer seeking help from Shaquille O'Neal in "Gone Boy",[25][26] and a song written by guest star Rachel Bloom in "Springfield Splendor".

[31] Executive producer Matt Selman was also the showrunner for several episodes, a role he performed since the twenty-third season.

[33] Commenting on the record, Jean thought the longevity of the series was due to the constancy of the Simpson characters, who have not changed since their inception.

[34] At the same time, creator Matt Groening stated that the producers keep the show relevant by trying to surprise the audience such as having guest animators for the couch gags.

[35] This season featured the first episode co-written by Miranda Thompson, the wife of writer Tim Long.

[43][44] On August 30, 2017, it was announced that longtime Simpsons score composer Alf Clausen was let go from the series.

[46] Zimmer and Russell Emanuel served as score producers with Andrew Christie being the lead composer.

[47] In December 2017, Fox released an animated short from series producers depicting Donald Trump attempting to bribe Robert Mueller with money and Carmen Yulín Cruz collecting it, a reference to the Mueller special counsel investigation and Trump's response to damage caused by Hurricane Maria in Puerto Rico.

[48] In March 2018, another short was released showing Trump confessing his reported misdeeds before he wakes up from his nightmare.

He also felt the season premiere and finale were metaphors for how to keep the show alive and how to deal with its inevitable end.

Actor Dan Castellaneta was nominated for the Outstanding Character Voice-Over Performance for his work in "Fears of a Clown".

[54] At the 45th Annie Awards, director Timothy Bailey was nominated for the Outstanding Achievement for Directing for his work in "Treehouse of Horror XXVIII".