Bart, Homer, Marge, Lisa, Maggie and the rest of the Simpsons' animated world that brought us the memorable utterances "D'oh!" and "Eat my shorts!" return with more smart -- and smart-mouthed -- comedy in its second season. As Bart continues to magnificently underachieve, the hapless, semi-dysfunctional family is joined by an array of guest voices, beginning the tradition of celebrities playing themselves in animated, hilarious form.