The Simpsons ~ Treehouse Of Horror XX Posted on October 31, 2009September 19, 2014 by TheHippieSeed The SimpsonsSeason 21: Episode 4 ~ 22:01 min.Get spooked with three all-new scary stories. More from my siteSnowMont Music Festival ~ March 30th-April 1st, 2012Terrapin Hill Harvest Festival ~ Sept 9th-12th, 2010MojoStock ~ July 29th-30th, 2011Video: Keller Williams Live at Garcia’s 8.1.18 (Full Show)LIVEDOWNLOADS.com ~ Further NYE 2010Suwannee Springfest 2015 Dates and Initial Lineup Announced