Factual error: A man in unmarked coveralls is addressed as "sir." This would imply he is an officer. Yet later, it is revealed that he is a Master Sergeant. Sergeants are never addressed as "sir." (00:08:00 - 00:14:50)
Continuity mistake: A man is shown throwing a lit cigarette at some mannequins located on the front lawn of a house at a test site. Later, the lit cigarette is discovered by Capt. Quinn conveniently and neatly placed on a concrete curb. (00:11:00 - 00:14:10)
Plot hole: Captain Quinn interrogates a Sergeant and presumably he is let go. Yet for no reason and against all probabilities, Captain Quinn keeps the Sergeant's wallet, which among other things contains the Sergeant's ID card, not to mention other personal effects. How is he going to get on the base without an ID? There is no legal basis for the Captain to keep it. Why keep it? So he could rifle through it and discover a rent receipt later in the show? This is a poor way to further the plot. (00:16:40 - 00:17:30)
Other mistake: A woman drops a camera and retrieves it after talking to two people. She then takes 15 steps to get back to where she was on a level path. If you drop a camera on a level path it will not roll that distance unless it is thrown down the path. (00:12:20)
Factual error: A vehicle is shown with US Army markings and a "US Government" license plate. First of all this is an Air Force Base, and a US Army vehicle would be the exception. Second, license plates on otherwise identified military vehicles are not used. Third, the license plate is of the 1990s variety and forward, and not one that would be used in 1952. (00:01:50)
Factual error: Military personnel are seen using coveralls and fatigues. But they have no markings or insignia on them. This is not regulation. (00:02:10)
Factual error: A US Air Force Staff Sergeant is seen delivering some documents. He is wearing Navigator wings. There are no enlisted navigators. Navigators are all officers. (00:20:45)
Factual error: Air Force personnel are retrieving supposedly alien debris from a forest. They are wearing dress blues, ties and all. This would never happen. They should be wearing what were then called "fatigues", essentially a precursor of the BDUs in use today. (00:16:00)
Factual error: In the last scene, a general is seen wearing service stripes on his left sleeve. Service stripes were authorized for only a very brief period in the USAF shortly after separation from the Army in 1947. And they have never been authorized for officers. (00:43:15)
Factual error: Military personnel do not exchange salutes when indoors. (00:20:15)
Factual error: Captain Quinn's uniform has many inaccuracies. He should be wearing a name tag. His ribbons are out of order of precedence. Worst of all, he has what looks like a Vietnam Service Medal with three stars, signifying having won the award four times. This is 1952. The medal was not even established until 1965. Vietnam was not even an issue in 1952. (00:21:30)
Factual error: Building 18 at the National Guard base has a crest saying "Fargo Air National Guard." This is incorrect. It is the North Dakota Air National Guard. Any crest other than the ANG would say the number and name of a unit based there, or the owning command. (00:13:10)
Other mistake: Dr. Hynek and some Men in Black are aboard a boat. There is loud music playing. When Dr. Hynek tries to turn the radios off, power is cut off aboard the boat, leaving it in darkness. When they want to use the electric winch to raise something, the winch works. If there is no power, what allows the electric winch to operate? (00:26:15)
Hopkinsville - S2-E4
Other mistake: Mr. Shoemaker tells Dr. Hynek and the Captain that the aliens he saw had three-fingered hands. A short while later he is caught giving a description of the aliens to a reporter. The picture drawn - based on Mr. Shoemaker's description - shows five-fingered hands. Plus later Dr. Hynek discovers a bio-luminescent hand print on a tree. It shows four fingers. (00:10:55)
Suggested correction: This is proved as a hoax so what the man said about the alien having three fingers could just have him mis-remembering the hoax details.
I can see that. OK.
Factual error: An Army Sergeant would under no circumstances be allowed to disrespect a Captain as he does Captain Quinn. (00:21:30)
Factual error: An entire platoon of Army soldiers salutes a civilian, which would never happen. (00:27:45)
Other mistake: The West Virginia News publishes a headline about the Flatwood Monster dated October 18, 1952. The incident took place on September 12, which was 36 days before. It does not make sense that a newspaper would print a headline story 36 days after it happened. (00:25:20)