When it's Jan's turn for the house of cards, when they show the card that she's about to put down in a close-up shot, it's the ace of spades. But then when they have the camera showing Jan about to put the card down, it changes to the 5 of clubs. But when they show the close-up of the card, it goes back to the ace of spades.
The scene of Alice giving Tiger a bath is the exact same footage of her used in the previous allergy episode "Katchoo."
Could Greg really have known that it was a color TV just by looking at it? There was no marked box, and no tags or stickers to indicate that it was any different than the more common black and white sets.
During Marcia's last turn at the house of cards, several angles of her are shown. At the beginning of the scene she carries the card with her right hand, and holds her dangling bracelet with her left, and most shots are consistent with this. However, in the third shot her bracelet is suddenly hanging free, and her left hand is nowhere to be seen.
When the girls go to the trading stamp store, there is a stuffed cat sitting up on the shelf-it looks just like Shirley's Boo Boo Kitty from Laverne and Shirley
In the same scene where the card house falls down, just before the scene fades, you can see Mike pushing on the cards that are standing up (they pop back up after he pushes them down)
During the house-of-cards building scene, Jan's hairstyle keeps changing. In all shots with just the girls, her hair is pulled back into a ponytail, and in all the shots with everybody else her hair is hanging down.
Cindy: Me first!
Bobby: Why you?
Cindy: 'Cause I'm a lady!
Cindy: I am a lady, if you say I'm not, I'll bop you!
This episode is parodied in A Very Brady Sequel.
The "house of cards" scene was filmed over two days, and the people in charge weren't very careful about everyone dressing the exactly the same way both filming days. Watch and you'll notice Peter's shirt change colors--twice--and Jan's hair go from ponytail to bobby-pinned. It's very obvious and amazingly, the editors let it slip by.
Nitpick: Marcia stresses over the possibility that her charm bracelet could knock down the house of cards. Why didn't she just remove it?
The girls (who win the "house of cards" building contest) decide on a present that benefits the whole family -- a color TV! Remember that color TVs were still a relative novelty in the late 1960s/early 1970s; less than half of all homes had one.
The title of this episode is a take on the slogan "54-40 or Fight!". The slogan came from what is known as The Oregon Boundary Dispute which took place in the early to mid eighteen-forties between the United States, Great Britain and Mexico over control of the Pacific Northwest Territory of North America. American citizens wanted the US government to annex the territory from other nations or go to war with them to claim it. The slogan is derived from the area's line of latitude which is 54 40.
Alice: That's like asking Garcia if he's got any messages.
This comes from "A Message to Garcia", an 1899 literary work by Elbert Hubbard which, with over 40 million copies published, had a larger circulation than any other literary venture has ever attained during the lifetime of an author.