The Simpsons - 11x21 - It's a Mad, Mad, Mad, Mad Marge

    Otto is about to get married, when the wedding is called off.  The fiancee, Becky, lives with the Simpsons while she gets her life back together.  While Becky gets more popular with the family, Marge is worried that Becky will replace her.  This leads to a third act where Marge is declared insane.
    I like this episode.  There are some good deliveries, some good gags are strange enough to be memorable (like Moe getting shrimp stuffed into his open mouth).  For some reason, the episode has a poor reception.  I'm not sure why, especially since the 11th season has a few other episodes that are noteworthy for being horrible - Kill the Alligator and Run, Saddlestore Galactica, or Take My Wife, Sleaze.  This isn't a spectacular episode, but it's still pretty good.