By this episode, the Huxtables have finished expanding and refurnishing the kitchen.
Cal says to another student that he visits one of his children the first Saturday out of the month and the other child the last Saturday out of the month, and then Cliff says [paraphrased], "You have two children and two girlfriends?" At that point, Cal never said he had two girlfriends.
Russell is holding the controller upside down.
When Olivia and Marlon were explaining to Grampa how to
use the buttons on the game, they said press "A to do
this...B...C...D," but since he was playing a Nintendo (8-bit), it only has an A and B button. No C or D.
Where did Laurie/Leslie come from? In The Moves, when Jeffrey was discussing his divorce with Cliff, he implied that he had only one daughter, Beth, who was living with his ex-wife. He never mentioned any other children. If he had more than one daughter, wouldn't he have said, "My daughters are living with their mother and come to visit me," or "My daughter Beth comes to visit me and I have custody of Leslie"? It doesn't make sense to invent another child just so Olivia can have a playmate.
In previous episodes, Jeffrey Engels' daughter was named Laurie, not Leslie.
Goof: Dabnis says he oversees a crew of 10 in his maintenance dept at Lincoln. It's possible, but even though Lincoln doesn't have a very large campus, having only 10 employees in their maintenance department (even in 1991) seems like a low number.
The vest that Sondra is wearing during the second scene was previously worn by Vanessa during the fifth and sixth seasons.
How can Elvin and Sondra purchase a house if Elvin is still in medical school and Sondra is presumbably still in law school with no income coming in? Neither one could have graduated that quickly. Elvin only decided he was going to go to med school 3 years earlier in The Birth (2), and Sondra was only applying for law school less than 2 years before in Elvin Pays for Dinner. Yes, Cliff and Clair co-sign for the loan, but still!
The last word that Cliff spells out is "XELFER." Flipped around, it spells the word that it was originally supposed to be, "REFLEX."
Why would Pam call "old head dudes" guys who are 19-20 years age, when she's a senior in high school (approximately 17-18) and they would only be a year or two older than her? Besides, the club was an underage club and 19-20 year olds would not be able to go to a real bar because they would be under 21, so it makes sense they go to this club. If anything, the club should have carded Rudy and friends.
If you look carefully at the very top of the screen during the scene where Olivia is telling the Huxtables that she didn't get to do her show-and-tell at school, you can see the microphone appear very briefly.
Pam calls Charmaine up her room saying "Come on up,
Charmaine," but when Charmaine knocks on the door, Pam
still has the dress she is working on in plain sight and
tells Charmaine to wait outside the door, while she hides
the dress and other sewing materials. Why did she tell
Charmaine to come up if she wasn't ready?
Goof: When Stanley arrives at the house and meets Kenny, he tells Rudy that he assumed Kenny was her brother. Stanley said earlier that he grilled Theo for information about Rudy in order to get her phone number, so Theo would have mentioned that he's her only brother.
Goof: Early in this episode, as one of the couples walks through the kitchen door into the living room, you can see a crew member's hand on the door pulling it closed.
Olivia, when you first see her, she is wearing Japanese wooden shoes. When she goes into the bathroom with everyone else, she's wearing blue slippers. Why the change of footwear?
When Cliff and Clair are in their room, you can look out their window and see trees! But their house and all the houses on their street are connected, so how could there be a tree on the side of their house?
Goof: Elvin has to sit on a stool at the dinning room table and remarks that they are all out of chairs, but when Clair and Vanessa go into the kitchen to talk, there is an empty chair sitting by the kitchen table.
Cliff and Clair refer to Vanessa as "the girl who wasn't gonna give us any trouble." Well, what about the time that Vanessa got drunk and the time she snuck off to Baltimore with her friends? Sounds like trouble to me.
After the commercial, when Olivia and her friend are watching TV, they look at each other and laugh, obviously on cue. They weren't even looking at the TV and started laughing at exactly the same time.