Cast: * Bart as Dexter * Lisa as Dee Dee * Homer as Dexter's Dad * Marge as Dexter's Mom * Grandpa Abe as Dexter's Grandpa * Mr. Burns as Mandark * Maggie as Lee Lee * Maude Flanders as Mee Mee * Milhouse as Dexter's Monkey * Slideshow Bob as Mandark's Duck * Ned Flanders as Major Glory