"Treehouse of Horror XV" is the first episode of the sixteenth season of the American animated television series The Simpsons.

[1] In the fifteenth annual Treehouse of Horror, Ned Flanders' head injury gives him the power to predict others' deaths, Bart and Lisa play detective when a string of Victorian-era prostitutes are murdered by Jack the Ripper, and the Simpsons go on a fantastic voyage inside Mr. Burns' body to save Maggie.

In desperation, Ned grabs a nearby security guard's gun to shoot Homer, fulfilling the original prediction, but in his death throes, Homer presses the destruct button with his tongue, much to Ned's fury before the power plant explodes and Springfield is destroyed.

Scotland Yard's Inspector Wiggum challenges master detective Eliza Simpson and her easily amazed, goofy assistant Dr. Bartley to solve the crime, though he orders Apu arrested anyway until they "find somebody darker" to frame.

Looking at the ledger, Simpson and Bartley discover the swords were sold to C. Ebenezer Burns, an industrialist who "makes coal out of babies".

Eliza and Bartley congratulate themselves for solving the crime, until they find another body, Selma, stabbed by another Sword of Osiris.

He starts to explain that he just wanted to come up with a case that Eliza herself could not solve, but then flees in a hot-air balloon stolen from Professor Frink, but it gets pierced by a steampunk-style flying saucer flown by Kang and Kodos, who consider Earth's air fleet as destroyed.

In a parody of Fantastic Voyage, at the "Invention Expo", Professor Frink creates a machine that shrinks objects.

Maggie crawls inside a giant pill, thinking that it is a ball pit, which is miniaturized and swallowed by Mr. Burns.

The crew manage to get the ship free from the outside and are able to reach the stomach by catching a ride on a nerve impulse, which Lisa calls "the body's information superhighway".

The submarine successfully escapes, but there is not enough time to save Homer, who instantly returns to his original size inside Burns' skin, putting them both in extra pain.

The episode ends with Burns and Homer leading a dance to the tune of "I've Got You Under My Skin" (along with the characters from all three segments and the opening sequence).

The execrable 'Four Beheadings and a Funeral' and 'In the Belly of the Boss' showing just how unfunny and lazily written these Halloween episodes can sometimes be.

"[8] "Four Beheadings and a Funeral" was put at #49 and said "The distinctive look of the segment is great, and the murders are gruesome, but the mystery-solving itself isn’t worth more than a shrug.