Get Your First Look at The Simpsons Treehouse of Horror XX! We've got some new photos from this Sunday's episode. Brian B. — October 15, 2009 in TV News Facebook Twitter Reddit Email Comment Get your first look at this Sunday's Halloween themed Treehouse of Horror episode of The Simpsons, airing on Fox! RELATED: Joe Bob's Haunted Drive-In Haunt & Horror Film Fest Comes to Southern California in October The episode stars Hank Azaria, Nancy Cartwrigh, Dan Castellaneta, Julie Kavner, Harry Shearer and Yeardley Smith. Topics: Halloween, The Simpsons Brian B.