At the end when Maurice and Ed are putting the population sign back up, Ed turns the ratchet the wrong way!
The buck Ed shoots is the same one (same footage) Chris can't shoot in Season 5 Episode 19 - The Gift of the Maggie.
The film Ed Chigliak and Heather Haynes are watching when Maurice and Lester walk in on them is Alfred Hichcock's 1959 thriller North by Northwest (1959) starring Cary Grant.
When Maggie is bowling with Bob toward the end of the episode, she tells him, "Watch this strike." She then proceeds to convert a spare.
Joel tells Maggie he needs a lift to the Aluetian Islands, specifically Bogoslof Island, in his search for the "Jeweled City of the North". Maggie responds, "there's nothing there". The real Bogoslof Island is a tiny 1 mile x 1/3 mile speck of land 30+ miles north of Umnak and Unalaska Islands (of the Fox Islands group). It is a designated wildlife sanctuary and is completely uninhabited.
When Dr. Phil takes the coffee cup from Joel, the cup in Joel's hand changes from red to blue.
In this episode Walt said that his 'true love' was Beatrice Anderson, who lost all her hair to a disease called Alopecia. In real life, Barry Corbin (Maurice Minnifield) was diagnosed with Alopecia.
In the episode "Three Doctors" 8 months earlier Ed tells Leonard he can't stand the sight of blood and Leonard told him he would get used to it. I guess Leonard was right, he got used to it; otherwise he wouldn't be able to look at all the units of blood they collected for the drive so easily.
Goof: Chris says the cerebellum could conceivably be affected by electromagnetic activity, thus explaining the dream-switching. All scientific questions aside, he has the wrong part of the brain. The cerebrum controls things like thought, memory, and dreaming; the cerebellum controls things like balance and muscle coordination.
Goof: When Shelly and Holling wake up, it is light out, but this close to winter the sun would be rising much later.
Factual error: Joel states that things fall at a speed of "32 feet per second squared." However, this is actually the rate at which gravity causes things to accelerate. Acceleration is the rate of change of velocity; speed is the absolute value of velocity. Since he memorized the number and is apparently very familiar with physics, it's unlikely Joel would be unaware of the difference.
Marylin states that she had read the "entire" Nancy Drew series. Considering new titles to the series were still being added to the original run of Nancy Drew books at the time of this episode's airing and ten years beyond that, her claim is doubtful.
Obviously, the writers did not do their Nancy Drew research.
Maggie: Did you ever read Nancy Drew?
Ruth-Anne: Thanks for the compliment, Maggie, but she was a little after my time.
Nancy Drew first appeared with "The Secret in the Old Clock" in 1930
The actress playing Ruth-Anne would have been twelve years old at the time, the target age for the Nancy Drew series, which was not only the most popular girls' series at the time, but the most popular juvenile series ever up to that date. The books were most certainly "during her time"
Goof: Joel insists he can't breach doctor-patient confidentiality and tell Maggie what's wrong with the owner of the curio shop. However, when Mike moved to town he had no problem telling her he had MCS, explaining his symptoms, and publicly expressing his professional opinion about them!
One of the townspeople refers to his "lawyer in Talkeetna." The real-life town of Talkeetna, Alaska, is widely believed to have been the inspiration for Cicely.
Goof: Maurice says his grandfather got the house in 1918, his father was born there, and then he was born there "twenty years later." However, that would make Maurice born in 1938, and he would have been far too young to fight in Korea in 1951.
About 14 minutes into the episode when Jeff Flemming arrives at the O'Connell house while Joel is in the living room chatting with people, the door bell sounds exactly like the good old NBC chime. Northern Exposure aired on CBS!
When Marilyn and the piano tuner are playing together at the end of the episode, there are three elementary-school age children sitting at the front tables. This marks one of the very few times that children have ever been seen in Cicely.
When talking with Joel at the Brick, Bernard takes his hands off the counter twice. Once when he is shot from behind and, for the second time, immediately after that, when he is shown sitting in front of the camera.
Goof: When Chris dreams he is in the "Last Supper Club," he is introduced to the Apostles. Four of them are called Matthew, Mark, Luke, and John. While these are the four Gospel authors, Mark and Luke were not Apostles, and therefore were not present at the last supper. (They were disciples of Jesus, but not called specifically by him.)