Shortly before the beginning of this season Markie Post discovered that she was pregnant. Christine's affair, marriage and pregnancy were written into the story arc so that they would not have to try and hide Post's actual pregnancy.
The title is of the song "Wedding Bell Blues" by Laura Nyro in 1966 and recorded by The Fifth Dimension.
Timothy Stack who plays Mr. Marley also played Tim Bond a government agent in two episodes in season 6 and Bill who was engaged to Christine in season 4.