The fifteenth season of the American animated television series The Simpsons aired from Sunday, November 2, 2003, to Sunday, May 23, 2004. The season contains five hold-over episodes from the season 14 (EABF) production line. The most watched episode had 16.2 million viewers and the least watched had 6.2 million viewers. Season 15 was released on DVD and Blu-ray in Region 1 on December 4, 2012, Region 2 on December 3, 2012, and Region 4 on December 12, 2012.