This Sunday, FOX will air the annual Simpsons Halloween special "Treehouse of Horror" episode. We've already told you that this year's installment will spoof Peanuts, advertising, and Transformers. Now we have some screen shots of the opening credits, courtesy of Best Week Ever.

As you can see from the picture above, The Simpsons are doing Mad Men this season. Now, there's nothing particularly Halloween-ish or scary about Mad Men (though we could talk for hours about how Mad Men really is kind of frightening, with marriages and characters and the American Dream falling apart and all that), but I've been waiting for someone to parody the beautiful opening credits.