Who was the show runner for the season in which "Treehouse of Horror XIII" aired?
Treehouse of Horror XIII: "Treehouse of Horror XIII" is the first episode of "The Simpsons"<nowiki>'</nowiki> fourteenth season and the thirteenth Halloween episode. The Simpsons (season 14):  The show runner for the fourteenth production season was Al Jean, who executive produced 21 of 22 episodes.
Al Jean