In the opening scene the hallway of Jerry's apartment building is different than the hallway in "The Kiss Hello" episode.
In the beginning when George, Jerry, and Elaine are first talking at Monk's about the stock, George's drink fluctuates from cut to cut from half full to full.
At the end of the episode, George is smoking in the restaurant but in another episode, Kramer gets kicked out of the restaurant for smoking.
George smokes a cigar when he is telling Jerry about the profit he made in stocks. It has been established in the episodes, The Wallet and The Invitations, that George doesn't smoke and he gets "nauseous" when he smokes cigars.
The actress who plays Marlene the ex-girlfriend, Tracy Kolis, will later play the role of Kelly the waitress who lies about having a boyfriend to George in "The Soup" episode.
The chiropractor charges George $75, and George, incredulous, says that he plans only to pay half. Then later in the coffee shop, Jerry reveals he paid the "extra $35." Either George paid more than he originally planned to, or even after Jerry's contribution, the doctor still only has $72.50.
This is the first time Jerry's unseen cousin Jeffery is mentioned.
Jerry is left handed, yet his baseball glove is for a right handed player. I guess it's possible for him to throw with his right hand, but I think this was simply a prop, and a continuity flaw.
This episode originally had a reference to executed serial killer Gary Gilmore's last words of "Let's do it" until the scene was changed during the final shoot. In the deleted scenes from the episode Jerry is trying to decide upon buying "The Jacket" when he finally remarks to Elaine: "Well, in the immortal words of Gary Gilmore 'Let's do it'".
This episode has the only mention of Elaine's mother on the show.
This episode introduces the running gag of George trying to restrain Jerry by pulling on his sleeve which Jerry responds to by yanking his arm away.
When Jerry and George are in the bathroom, George dries his hands with a paper towel, even though he never washed them.
On hearing George's obsessive singing of "Master of the House" from Les Miserables, Jerry tells him that composer Robert Schumann was driven mad by hearing a note, possible A, over and over in his head. "Master of the House" is in the key of A (minor in the verses, major in the chorus).
As Jerry and George are walking out of the restaurant with Elaine and her father, George starts singing. Elaine's father tells George to quiet down. After this, George's glasses are gone that were present in the previous shot. Then, in the next shot, they reappear.
George pours himself a glass of water from a single serving bottle and he puts the empty bottle back in the fridge.
When Jerry and George meet up with Elaine's father at the hotel, they escape to the bathroom.... Jerry goes, then George. When they switch to the Bathroom, Jerry is washing up, takes a towel and dries his hands & face while they talk.
As they leave, George throws his paper towel into the trash can on the right. Jerry throws his paper towel into the trash can on the left, but misses... The paper towel lands on the floor.
When Jerry talks about himself being lactose intolerant, he is filling up the left glass with wine and holding the bottle. In the next shot, when he says "I won't stand for it," the right glass is full and the left is empty, and the bottle is sitting on the other side of the counter.
Jerry's apartment number is 3A in this episode instead of the usual 5A.
When George, Donna and Jerry are discussing the Dockers commercial, the wine glasses on the counter are alternately empty, then one is half filled with wine, then both are again empty. The wine glasses also move around on the counter depending on the camera shot. At no time does anyone touch or pick up either of the wine glasses after Donna puts hers down when George comes into the apartment.
Elaine mentions a brother-in-law which means she either has a sister or a brother, but, like Jerry's mentioning of his sister in "The Chinese Restaurant," Elaine's brother-in-law (or brother and sister) is never referred to again.