Factual error: The date stamp says that it is April 12 and Scully says that it is Sunday, but April 12, 1997 was a Saturday. (00:03:10)
Factual error: When Byers asks Langly to try under active cases to find Holly Modeski in the FBI database, Langly only presses two or three keys on a keyboard, which is obviously not enough to enter "Holly Modesky" to the search engine. (00:19:40)
Factual error: When two unidentified men who approached Susanne Modeski in the warehouse take out their handguns, they have regular pistols. However, when they start to shoot, continuous fire is heard that could only be produced by an automatic weapon. (00:28:40)
Suggested correction: Fully automatic pistols exist, such as the Glock 18.
Factual error: When Suzanne Modeski retreats to the restroom with a pair of pliers to pull out her tooth, she is only gone for approximately 15 seconds before the gunmen follow her. For a petite woman to rip out a strong, healthy molar from her own mouth (which also had metal prongs Underneath in her gum) would not take so little time, no matter how determined she was. It's also highly unlikely that the lack of anaesthetic would have allowed her to do so without making pained noises.
Factual error: When Mulder is walking out of the cabin in Spender's uniform, the soldiers try to stop him. This is impossible since he is an officer (a lieutenant judging from the shoulder-straps) and they are privates, so they cannot give him orders. The only thing they can do in this situation is to salute him. (00:08:40)
Factual error: The alternate version of Scully is identified as an OSS agent, but the OSS did not exist in 1939. (00:34:35)
Factual error: Lewis Brady had a "Felon wanted by the FBI" file in 1929, but the FBI wasn't called the FBI until 1935; until then it was just the "Bureau of Investigation." (00:34:30)
Factual error: The Beginning of the episode shows a baseball game taking place in Roswell, New Mexico. A ball smashes into a sahuaro cactus. The only place in the United States of America where sahuaros grow is in the Arizona desert. There are none in New Mexico.
Factual error: In this episode, Mulder says, "In 1996, a rock from Mars was found in Antarctica." The rock ALH84001 was found in 1984, and the announcement that it may contain life came in 1996. (00:17:55)
Factual error: This episode begins with Scully doing a voice-over about the incredible nature of our universe. The scene is very impressive visually, and would have been from the aspect of her oral presentation had it not been for a major error in the script. She says (more than once) that the universe is made up of matter and gas. This should have been "matter and energy". Gas is a form of matter.
The Sixth Extinction (2) - S7-E1
Factual error: When Mulder is visited by his mother, he definitely shows brain activity, because he is "talking" with her, however there are only flat lines on the monitor. In a similar situation in "The Sixth Extinction" episode, when Kritschgau and Skinner ask him questions and he anticipates them, the monitor shows intensive bursts. (00:01:15)
The Sixth Extinction (2) - S7-E1
Factual error: When Skinner is at Kritschgau's apartment building, the time stamp onscreen says it's 5:05 AM, but when Kritschgau answers his door, he says it's 6:00 in the morning. Plus it is shown to be broad daylight outside. The sun is never up that early in Washington, D.C. (00:15:55)
Millennium - S7-E4
Factual error: When Mulder wants to shoot the third resurrected agent, it turns out that there is no ammunition left in the revolver. In fact, there should be one bullet left. When Frank Black takes the handgun from the necromancer, one can see that the cylinder is full with six bullet. Then, he fires three bullets into the first resurrected agent and two bullets are fired by Mulder into the second resurrected agent. (00:39:05)
Factual error: Mulder calls the dust in Maleeni's van "lycopodium powder" that the Los Angeles Police Department used to collect fingerprints, but the real LAPD uses latent print powder not lycopodium. (00:06:35)
Factual error: When Reverend O'Connor is reading from the Book of Revelation, his Bible is flipped open towards the front. Revelation is the last chapter in the New Testament, so his Bible should have been open towards the back. (00:14:30)
Roadrunners - S8-E4
Factual error: At the episode's end, it shows Scully recuperating at the BYU Medical Center in Provo, Utah. However, on the flagpole outside of the center, you can see the Kansas state flag. (00:42:20)
Factual error: Dogget says that "It would require something 4,300 times the density of steel to cause this damage." Steel is about 8 times denser than human flesh, so bearing in mind that density is proportional to mass at constant volume, it means that Ray would be 4,300 x 8 = 34,400 times heavier than if he were a regular human being. Assuming that he normally weighed about 80 kg, after the transformation he would weigh 80 kg x 34,400 = 2,752 tons. It means that hardly any ground would support his incredibly huge mass, let alone items such as a bed, chair, stairs, building structures, etc.
Nothing Important Happened Today II (2) - S9-E2
Factual error: After a short examination of Shannon McMahon with a stethoscope and blood pressure meter Scully definitely claims that physically Shannon is absolutely normal. However, this type of examination cannot reveal any of Shannon's supernatural abilities. In order to prove or disprove that Shannon is a supersoldier, Scully could only examine if she could breathe underwater. (00:19:55)
Nothing Important Happened Today II (2) - S9-E2
Factual error: Deputy Director Alvin Kersh tells Agent Doggett a story about King George III, who, on July 4th, 1776, the same day the American colonies declared their independence, allegedly made an entry in his diary: "Nothing important happened today." However, according to Arnold Hunt, curator at the British Library, King George III never kept a diary. (00:37:15)
