Frasier says he hasn't been in private practice for "12 years," but it has only been 10 (he gave up his practice in Boston in 1993, and it is now 2003).
Alistair: Well, I would be content if my Mimi would just lay off the cheeseburgers
This wouldn't have been the first time that a Mimi didn't look the part of a woman dying of consumption. Legend has it that the soprano who performed the part at the premiere of La Boheme in 1896 had wasted away to 300 pounds.
Up until this point, although Gil Chesterton is portrayed as gay in manner and speech, there has been no admission on his part that he is, nor has the show offered any such evidence. During the end credits, we finally see Gil actually doing something that indicates that he is in fact gay - namely, going into a gay bar (Bad Billy's).
The first line in this episode is Daphne saying, "It's official. Doctor Lee says we're pregnant". It's amusing to hear that there was some doubt about it with Jane Leeves' abdomen sticking out as it is. She was clearly pregnant herself at the time with her son, Finn William Leeves Coben, who was born December 19th, 2003, less than three months after this episode aired.
In this episode, Frasier tells Julia that Florence, Italy is his favorite city. But in "It's Hard to Say Goodbye If You Won't Leave", he tells Kate Costas that Paris, France is his favorite city.
The "soothing" DVD that Niles chooses at Frasier's is The Mikado (1939).
Frasier mentions several times that he and Julia have dinner reservations at Chez Henri. However, he was banned from the restaurant in the Season 9 finale, "Moons Over Seattle". It's possible that he made peace with the owner but highly unlikely.
Many times characters say that Frasier and Roz slept together "two years ago," but in fact, it was only one year ago.
During the episode, Martin becomes convinced the Leland (played by David Ogden Stiers) is the real father of Frasier and Niles due to their shared interests and unlucky timing of Martin walking in on Leland with Frasier and then Niles doing fatherly stuff (reading a story to a sick Frasier in bed and then helping Niles walk off a stiff leg). When Martin finally asks Leland about it at the end of the episode, Leland reveals his homosexuality. David Ogden Stiers has since come out as gay.
When Leland Barton (who worked closely with Martin's wife) arrives to visit Frasier and his family, Martin has some doubts if he really is the father of Frasier and Niles, since Leland shares so many interests with Frasier and Niles. In Cheers, Frasier stated his father was a research scientist. It is then referred to in the episode "The Show Where Sam Shows Up" and explained the discrepancy.
Niles: Leland, it is such a pleasure to talk shop with a fellow nutcracker.
Leland: And talking to you Jung people makes me feel like an id again.
Niles: Do you have a pun, Frasier?
Frasier didn't, but he might have responded, "I'm a-Freud I can't think of one".
When Niles and Frasier are talking in Cafe Nervosa, the viewer can see a female customer in the background when the camera shows Frasier in the foreground. The entire conversation between Niles and Frasier lasts about one minute, yet in that time the viewer can see the woman (1) chatting with her unseen companion, (2) casually lifting her coffee mug to her lips and appearing to blow on it as if to cool it, (3) chatting some more with her mug back on the table, (4) lifting it to her lips again and blowing again, (5) thumbing through some sort of book and (6) getting up and leaving the cafe. Why did she get up to leave? If her coffee was too hot for her to drink, it must have just been served. She couldn't possibly have finished and paid for her coffee before leaving the cafe.
As Daphne's observer is asking Martin, "Now, you have a bullet lodged in your hip, correct?", you can clearly see the boom microphone hovering above her head.
In the scene on the Caspian Queen, when Frasier hands Peter's business card to the Russians the dialogue between the two is best translated as:
"He's had some business cards made."
"What an idiot, eh!"
Later when Frasier stipulates how much caviar he wants:
"Get me another can."
Altough the French shopkeeper, Robert is the same as in Season 5's "The Perfect Guy", the layout of the store itself is completely different.
Comment: It's quite plausible that the store could be redesigned in a 5 year period.
In this episode, Frasier can't ride a bicycle, however, in Season Five's "Desperately Seeking Closure" we learn from Niles that Frasier once owned and rode a moped, "in order to hang out with the cool kids".
Because they can't ride bikes, Frasier says he and Niles were always annoyed when someone used the expression, "Easy as riding a bicycle." However, Frasier uses the expression himself in the episode "Deathtrap".
When Frasier takes the game hens out of the oven in his apartment one one side of the pan his hand is on it without an oven mitt or towel so it's unlikely that his hands would not get burned a little.
When Niles and Frasier are fighting about the sauce you can see that as they are both holding the pan at the bottom. How could it not burn their hands if it had just been taken off the stove?
Editing goof: When Niles and Daphne are on the phone at the end, and she tells him the truth about the photo, in the next shot Niles has suddenly hung up his phone and is looking at the photo. A few "deleted seconds" perhaps?