Pengarah:
Steven Dean Moore / Nancy Cruise / Mike B. Anderson / Mark Kirkland / Matthew Naschik / Bob Anderson / Lauren McMullen / Jim Reardon
Pelakon:
Dan Castellaneta / Julie Kavner / Nancy Cartwright / Yeardley Smith / Hank Azaria / Harry Sher / Pamela Hayden / Lucy Taylor / Maggie Rosewell / Trace McNeil / Marcia Wallace / Carl Viedegote / Oscar de la Renta / Jennifer Garner / Jerry Lewis / Glenn Close / Michael Moore / Tony Blair / Jane Leeves / Ian McKellen / J.K. Rowling / Charles Napper / Jackie Mason / Laurence Troud / Tom Clancy / Ashley Olsen / Mary-Kate Olsen / Thomas Pynchon / Nick Burkey / William Daniels / Isabelle Shafferd / Dick Turfield / Simon Cowell / Jon Rahway
The Simpsons #39; musim kelima belas bermula pada hari Ahad, 2 November 2003, dengan "Treehouse of Horr"