This episode was the show's return to air after a two-month hiatus during which it was considered for cancellation. But its new time slot after Cheers (1982) helped boost the show's ratings and get it renewed for a third season.
This is the first episode where Elaine does her "Get out!" shove. Julia Louis-Dreyfus actually does that shove in real life and the moment was not in the original script.
Jerry's apartment is 5A from now on.
Jerry's noisy musician neighbors never make another appearance.