| "Treehouse of Horror XX" | |
|---|---|
| The Simpsons episode | |
 Promotional image for the episode | |
| Episode no. | Season 21 Episode 4 |
| Directed by |
|
| Written by | Daniel Chun |
| Production code | LABF14 |
| Original air date | October 18, 2009 |
"Treehouse of Horror XX" is the fourth episode of the twenty-first season of the American animated television series The Simpsons. The episode was directed by Mike B. Anderson and Matthew Schofield and was written by Daniel Chun. It first aired on the Fox network in the United States on October 18, 2009.
This is the twentieth "Treehouse of Horror" installment, containing three self-contained stories: In "Dial 'M' for Murder or Press '#' to Return to Main Menu", Lisa is forced into a Hitchcock-esque murder scheme by Bart; in "Don't Have a Cow, Mankind", Springfield is once again overrun by zombies thanks to Krusty Burger's latest sandwich; and in the Sweeney Todd parody, "There's No Business Like Moe Business", Moe the Bartender bleeds Homer dry to create the perfect microbrewed beer. This is the first "Treehouse of Horror" episode for many things: airing in the month of October since "Treehouse of Horror X" a decade prior, being produced in high definition, and with opening production credits that are white rather than the customary green.
An estimated 8.59 million viewers tuned in to watch the episode.[1]