Marge hires an investigative television show to follow Homer around after she suspects him of cheating on his diet. Meanwhile, one of Bart and Lisa's pranks on Martin Prince goes wrong and they become burdened with guilt after assuming they are responsible for Martin's accidental death.
Elenco: Dan Castellaneta , Julie Kavner , Nancy Cartwright , Yeardley Smith , Hank Azaria , Harry Shearer .