When Reverend Lovejoy reveals that his license to wed couples expired years ago (meaning that Homer's divorce from Marge on "A Milhouse Divided" was legal and Homer ''was'' legally married to Amber from "Viva Ned Flanders"), Homer and Marge set up a third wedding to correct the mistake, but Marge's bridezilla attitude and Homer's disappearance complicate things.

!! Tropes:

* NotMeThisTime: When a clue with the initials [="SB"=] was found, Bart and Lisa at first assumed Homer was abducted by Sideshow Bob. Homer was actually abducted by [[ObnoxiousInLaws Patty and Selma Bouvier]].