Edith says that it will be the first night that she and Archie slept separately in 24 years. But in the episode "Edith Has Jury Duty", Edith spent several nights in a hotel.
Edith also took Gloria and left Archie for a short time when Archie wouldn't quit gambling early in their marriage so she slept apart from him then too.
Don't forget "Cousin Maude's Visit" when Maude made the sickly Archie sleep on the couch.
This episode was videotaped on August 04, 1972.
Gloria LeRoy would later play Mildred "Boom-Boom" Turner, a secretary at the plant where Archie worked, and later a part-time waitress at Archie Bunker's Place.