Anthology episodes

Over the long run of the Simpsons there have been several episodes which feature 3 mini-stories that are held togeather by a base plot. The Halloween episodes are the most well known but there have been many others, after season five the backbone story was removed from the halloween episodes but the 3 mini-stories still remained. What follows is a list of these episodes. The seventh season episode 22 Short Films About Springfield does not follow the same pattern as the others but it can be considered an anthology, the episode inspired Simpsons creator Matt Groening to come up with a concept of a possible spin-off series called Tales from Springfield, about the recurring characters of Springfield

Season 1

Season 2
 * Treehouse of Horror

Season 3
 * Treehouse of Horror II

Season 4
 * Treehouse of Horror III

Season 5
 * Treehouse of Horror IV

Season 6
 * Treehouse of Horror V

Season 7
 * Treehouse of Horror VI
 * 22 Short Films About Springfield

Season 8
 * Treehouse of Horror VII

Season 9
 * Treehouse of Horror VIII

Season 10
 * Treehouse of Horror IX

Season 11
 * Treehouse of Horror X

Season 12
 * Treehouse of Horror XI

Season 13
 * Treehouse of Horror XII

Season 14
 * Treehouse of Horror XIII

Season 15
 * Treehouse of Horror XIV
 * Margical History Tour

Season 16
 * Treehouse of Horror XV

Season 17
 * Treehouse of Horror XVI

Season 18
 * Treehouse of Horror XVII

Season 19
 * Treehouse of Horror XVIII

Season 20
 * Treehouse of Horror XIX