*In the one-hour “Simpsons” episode titled “The Great Phatsby,” Emmy Award nominee Taraji P. Henson, comedian Keegan-Michael Key and rapper Snoop Dogg lend their voices to characters who help Mr.

The Simpsons, television’s longest-running American sitcom and the longest-running American animated program, will air its first hourlong special Sunday, and it’s bringing in some heavy hitters.

First Look Poster: See how Taraji P. Henson, Snoop Dogg, Common and RZA get animated for "The Simpsons." “The Simpsons” finally came up with its first-ever one-hour episode by accident. In the episode ...