In this episode Jean Stapleton plays two characters. As Edith Bunker her earrings change from gold that curve below her lobes to white round ones later in the show.
The LaSalle - a GM car produced in the 1930s - was immortalized in the opening credits when Jean Stapleton sang the line "Gee, our old LaSalle ran great." However, the line was somewhat slurred at first and people wrote in asking what she was saying. In later seasons the opening was refilmed and Stapleton sang the line slower and more phonetically so it could be understood.