Continuity mistake: When Scully is reading report from Simmons' death, we can see that is has occured on the 7th of November, 1993; which means that whole episode takes place at the very beginning of November, but at the same time Scully and Mulder should be at Alaska (see episode "Ice"). (00:02:15)
The Sixth Extinction II: Amor Fati (3) - S7-E2
Continuity mistake: When Scully is talking to Skinner in Mulder's empty hospital room, her cross necklace is off to the left. Then, when she says, "Sir." it's almost centered. And no, this was not caused by her turning around a minute or so before she said it. (00:07:10)
Anasazi (1) - S2-E25
Other mistake: Immediately after a shot has been heard, Mulder, who is in flat #42, grabs his gun and rushes through the corridor passing by flat #47, which means he is still on the same floor. Within 10 seconds after the shot, the next-door lady is already aware of the crime. Not mentioning that 2 seconds later two policemen arrive at the scene. (00:07:21)
Plot hole: At his arrival at the Arecibo observatory, Mulder crushes the padlock on the door leading to the control building, and then he finds the native man, Jorge, in the toilet, who hid himself in the building. There's no way Jorge could enter the building and also lock himself in there with the padlock. (00:17:45)
Plot hole: After less than 1 minute of investigation Scully found out that the photograph was bogus. It tells a lot about the "very best" specialists, mentioned by the Deep Throat later on, who had prepared the photo. (00:19:10)
The Lost Art of Forehead Sweat - S11-E4
Continuity mistake: When the camera shows Reggie Something from behind, he is shaking his head. However, after the cut, his head is static. (00:17:20)
Continuity mistake: The remote control, close to the TV, changes position in between shots near the start. (00:05:03 - 00:05:29)
Continuity mistake: Both the X-ray image and Mulder's statement suggest that the letter opener has penetrated Dr. Sanjay's head at an acute angle. However, during the autopsy, Scully removes the object as if it had been shoved horizontally. The latter position is confirmed by the suicide scene itself at the start of the episode. (00:08:25 - 00:10:10)
Continuity mistake: Soon after Dr. Sanjay falls, the blood flows down his cheek. However, when Mulder examines the scene, Dr. Sanjay's cheek is clean and the blood spot is on his forehead. (00:03:37 - 00:04:10)
Continuity mistake: The pencil on Dr Sanjay's folder is in a different position when the footage is taken from behind him. (00:02:24)
Continuity mistake: When Chuck Burks is analyzing the pottery, we can see that one of the pieces has a broken edge. Seconds later, the image shows the piece of pottery with the border preserved. (00:17:12 - 00:18:17)
Continuity mistake: Near The End of the episode, Mulder is reviewing black-and-white photos of The Jersey Devil. A wedding ring is visible on The Jersey Devil's left hand in the photo. Earlier in the episode, she is not wearing the ring.
Factual error: A number of episodes show trolleybuses operating in American cities that do not use them (including Washington). Vancouver, where the series was filmed, however, does use them.
Visible crew/equipment: When the tiger is on the loose it prowls around a building site and there is a shot where you can see the animal trainer calling the tiger right to him. (00:23:56)
Revealing mistake: When Mulder and Scully are talking to Theresa at the diner she suddenly gets a nosebleed. If you look closely at her forehead/nose you can see the flesh coloured tube that pumps the blood. (00:33:20)
Other mistake: When Agent Comer is trying to steal the truck, he wants to hot-wire it. To do so, he unplugs the power and ignition wires in order to short-circuit them. When the owner unexpectedly appears, Agent Comer beats him up, steals the ignition key and starts the car with the key. The problem is that after unplugging the wires he cannot start the car with the key anymore. (00:20:40)
Character mistake: When Josepho meets Agent Scully, he recites to her the passage from the Bible that begins with the phrase: "Behold, a whirlwind came out of the north" Then he asks her if she knew that fragment from the Bible. She answers: "Ephesians." Unfortunately, she is wrong, because this fragment comes from Ezekiel 1:4. (00:30:30)
Other mistake: While Cadet Hayes is being interrogated, he says, "I studied the photos of your son's death. They called to me. I don't know why, but it was a message and I listened." Then Scully answers, "And then you killed Agent Doggett's son." This answer is illogical and complete nonsense because the photos of Agent Doggett's son were taken after his death. (00:36:05)
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.
Audio problem: Fellig is confronted by the murderer and you can hear the sound of a switchblade knife opening. When the knife is shown in Fellig's back and later in the evidence bag, however, it is a butterfly knife and not a switchblade.
Answer: As he stated many times throughout the series, Mulder needed Scully to be sober and skeptical. Whenever Scully's skepticism wavered and she started questioning her own rationality, Mulder would try to restore her sense of skepticism, because he needed her to be clear-thinking.
Charles Austin Miller