22
Treehouse of Horror XXV
As of the 2013-2014 season, 24
Yes. It aired in Season 24 on October 7, 2012.
The first Halloween special for "The Simpsons" aired in 1990. The shows are referred to "Treehouse of Horror". The very first was called "The Simpsons Halloween Special".
The first one - aired on October 25, 1990. The three tales are "Bad Dream House", " Hungry are the Damned" and "The Raven"
Mr. & Mrs. Simpson was the second installment of Treehouse of Horror XVIII from the 19th season that aired on November 4th 2007.
234 episodes aired during that decade.
At the end of 2012, 516 episodes had aired.
429 at the start of 2009449 by the end of 2009
No, it appears new episodes have never aired at 9pm on FOX. Syndicated episodes perhaps, but not new.
The hit show "The Simpsons" is considered an adult animated sitcom. The show originally aired on December 17, 1989 and has featured hundreds of episodes.
"Every Man's Dream" was the 575th episode aired on The Simpsons