The episode opens with a warning about its scary content, then cuts to Bart and Homer interacting with the viewer.

The narrator finishes the introduction to the Halloween special.

The family is at the lodge, and Homer realizes he forgot to lock the doors and left Grampa behind.

Homer discovers there is no beer or cable TV and becomes agitated.

Homer's behavior escalates as he talks to Moe and threatens Marge, while Marge calls the police.

Willie arrives to help, but Homer fights him off.

Homer's murderous urges fluctuate as he watches TV with his family.

Homer's hand gets stuck in the toaster while watching TV.

Homer accidentally travels back in time after fixing the toaster.

Homer squashes a mosquito in the past and returns to a changed future.

Homer finds himself in a world where Flanders is the ruler.

Homer escapes and finds a reality where his sisters-in-law are dead and he has a luxury car.

Bart is sent to the cafeteria and discovers the staff's dark secret.

Skinner reveals that Jimbo was killed and served as food.

Bart tries to tell his mom about the cannibalism in the cafeteria.

Bart returns to school and is threatened by Skinner.

Bart wakes up from his nightmare, but the family is then attacked by a fog.