Factual error: Bessie says she was going to study veterinary medicine at Texas A and M. That would have been approximately 1940. Neither women nor people of colour were admitted to TAMU until 1963 so she could not have even been able to apply.
Factual error: This episode reveals that Winston is colorblind, seeing green as brown. But later in the series, Winston becomes a cop, working for the LAPD. This wouldn't have happened because candidates for the LAPD are put through a color blindness test where they are required to quickly and accurately identify colors. Winston would have failed and would not have been allowed to join the LAPD.
Uniform Day - S6-E17
Factual error: It is Uniform Day where they all have to wear their uniforms. The badges they all wear are those of patrolmen. The problem is that they are detectives and the NYPD has detective badges, which are distinctly different looking.
It's Good to Be Back on the Moon - S1-E9
Factual error: The Apollo 11 flag gets knocked over by the Chinese rover...but the flag was blown over by the Eagle's takeoff thrust, witnessed by Buzz Aldrin. This was confirmed years later by the Lunar Reconnaissance Orbiter, which showed shadows of the flags planted at all six Apollo landing sites, bar Apollo 11's. The other 5 were all planted further from their landing craft precisely for that reason. It's also widely assumed that the flags on the moon would have been bleached white by decades of unfiltered sunlight, not in good condition like the one shown.
Factual error: When Carter is reading the newspaper there is no date on the front page.
Factual error: Myra's pet "chameleon" is some other type of lizard, not a chameleon.
Factual error: When the trucker reaches into the bag that's suppose to have his cash with his "bonus", he's bitten by a venomous snake. However, we see the snake and it's a non-venomous king snake.
Lighthouse Keeping Loonies AKA The Lighthouse Men - S5-E8
Factual error: The "oil" that spurts up from underground is far too thin to be oil.
Factual error: PJ is getting his hair cut by an attractive female barber. Attached to the outside of the window is a neon sign reading "BARBER SHOP," but the sign faces the inside of the building so it would be backwards to people outside.
Factual error: David Jason's character visits the bank to pick up the share certificates left to him by a previous Master. Much to his surprise the bank manager tells him that these shares are now worth £500,000. The bank manager looks at the certificates, then at a screen by his desk before making the calculation very quickly in his head. Given that the certificates are decades old this is impossible. It would take a considerable amount of time to work out the new number of shares that the certificates would entitle the bearer to based on share splits and consolidations over the years. Also, the shares would be denominated in pre-decimal currency so they would have to be revalued based on the conversion rate at the time Britain went decimal. It would be a time consuming and painful task to decide their new value.
Factual error: During "Jester Balowski's Medieval Torture Hour," Balowski grabs the guys arm and bends it the way arms are supposed to bend, yet you hear a breaking noise.
Factual error: Nancy takes her son Silas to an 'underground' doctor used by gang members following an attack by a biker gang. After she tries to negotiate a lower price due to the lack of anesthetics, the doctor says that he can get a second opinion at a hospital and order a $10,000 MRI if she would rather pay for that. However, an X-Ray is the first, less-expensive method used by emergency rooms and trauma centers to confirm a fracture. An MRI is typically only used to evaluate skull/brain-related injuries, but is a rarer utilized, expensive second option to evaluate a fracture that generates an unclear X-ray.
It's Only Rock and Roll - S4-E4
Factual error: When Del is running out of the pub, him and one other are carrying guitar amp heads and are flinging them about with ease. Heads weigh around 20-30 kg each and would be extremely hard to fling around in such a way as they are. (00:17:00)
Factual error: In "The State Vs. Chip Douglas", Ernie finds his missing 1914-D penny when it falls out of his pocket. A close-up shows an Indian head penny lying on the floor. The problem is that Indian head pennies were not minted after 1909.
4 Rms Ocn Vu - S3-E8
Factual error: Some of the visitors came to the Keaton "hotel" (their house) for the "ocean view." This takes place in central Ohio (near Columbus). There are no oceans around there.
Factual error: The apartment makes no sense.There are 3 steps down to the living room which you might have in a house but not in a high rise apartment building.The hallway shows a door for another apartment which would put most of its apartment out past the edge of the building.
Factual error: The conversation between Taylor and Michelle tells us that school is over for the day and that Taylor talked to her crush at lunch. When the boy shows up at the bakery later, he and Taylor plan to meet at 3 that afternoon; if its before 3, they should still be in school.
Peeled Grapes and Pedicures - S1-E6
Factual error: Gracientus threatens to assault Aulus Paulinus by shoving a porcupine up his toga. A Roman in AD 123 (or any European, including the Britons for that matter), would not have had the slightest idea of what a porcupine was. He might threaten him with a hedgehog, but a porcupine? Never.
Factual error: When Ralph goes out the window onto the fire escape to save Ed the first time in the episode, Alice is looking out the window (to her right) telling Trixie all the step by step movements of both men, ending with, "and he's taking him right into your window." The Norton's live directly upstairs from the Kramdens, but Alice never changes the direction she's looking at the whole time. She should be looking straight up as Ralph leads Ed into their window. There is no other window to the right. (00:02:30 - 00:03:04)
Factual error: At the start of the show, it states it's 1902. However in the opening scene, the flag shown is the 1912 design, with 48 stars. In 1902 there were only 45 states.