The set designer at the time, Ted Offenbecker, didn't like the Ricardo's sectional couch set of furniture, so that is what inspired this episode to be written. Also, the writers thought it would be best to give Fred and Ethel some better-looking furniture, so that scenes could take place in the Mertz's apartment more, for a fresh look.
This is one of the few times that Lucille Ball completely messes up one of her lines. She was supposed to say "paint the apartment and re-upholster the old furniture," but she slipped and said, "paint furniture and re-upholster the old furniture." It was thanks to Desi Arnaz's quick thinking and ad-libbing of the line "I didn't hear you" that the scene was able to go on.
In the final scene, where Lucy and Ethel are sitting on Lucy's new furniture, you can still see rogue feathers from the previous scene floating around.
We learn that Mrs. Trumbull always babysits Little Ricky for free.
This is the third of four living room set changes, but it is also the one that lasts longest- from season 3 (8 episodes in) to season 6 (10 episodes from the end of the series, when they move to the country and spend $3500.00 on the final living room set).