Factual error: The blue license plate with yellowing lettering has not been used in Pennsylvania since 1999. The date on the inspection sticker on the front windshield of a vehicle was "7/17" (July 2017 expiration date). A 2017 Pennsylvania plate was (and still is) white in the middle with a strip of blue along the top and yellow along the bottom. (00:19:52 - 01:19:30)
Factual error: The opening scene shows Cassie and Bryan booking their holiday on a laptop. The dates that they book the holiday home are between May 5th 2018 and May 12th 2018, which means the movie is set in 2018. But later in the movie, when Cassie finds the video of Bryan with the two women on his phone, the date is listed as "Sunday, May 7", and May 7th 2018 was a Monday, not a Sunday. (00:01:05 - 01:10:55)
Factual error: There is absolutely no way the university would have the authority to have the church torn down by a demo team when Dave and Pearce find them doing just that. Nowhere near enough time has passed for eminent domain laws to have been enacted. It often takes a year or more just for these things to go to trial, and there's a good chance the university would lose the case anyways.
Factual error: Michael boards a commuter train at Grand Central, which then stops at subway stations at 68th Street, 86th Street, and 110th Street along Lexington Avenue. This is impossible.
Factual error: There are no law enforcement agencies referred to as "Mounties" in Alaska, or any elk.
Factual error: You can't detonate C-4, or any plastic explosive, by shooting at it. It's made to only be detonated by a smaller explosion (a detonator). (01:27:05)
Factual error: Sherman prints a gun through the hospital's 3D printer. We see the gun, the cylinder, and 6 bullets. But if bullets are printed too, they still would need to contain the gunpowder, and the 3D printer construct shown there looks made out of a single kind of material, plain looking, surely not the product of a wonder machine that'd be able to recreate the complex chemistry required to make working bullets it was not even designed to do - in fact they look like suppositories, with no division at all between primer, casing, etc.
Factual error: When the saturation divers open the outer hatch on Kursk, they drop a glow stick. When they do, it falls to the floor on the submarine, indicating the inner hatch was open. The inner hatch of Kursk was closed, later opened by an ROV.
Factual error: When Connor is describing his 1970 LT-1 Corvette,, he says "Holley and Rochester Quadrajet carb." Those are two different brands of carburetors. (01:05:39)
Factual error: Wilde and Bosie meet at a railway station that is just signed "Rouen." There were then two main railway stations in Rouen: Rouen-Rive-Droite and Rouen Saint-Sever (or Rouen-Rive-Gauche). Neither would have a sign saying just "Rouen."
Factual error: Grace was supposedly a captain in the Marines and a dog handler. Dog handlers in the Marines are not officers. They are junior enlisted personnel (E-3 through E-5). Also, they must first hold the Military Police MOS (Military Occupational Specialty) (5811), after which they may add the Military Working Dog Handler MOS (5812) as a secondary MOS.
Factual error: Simon receives an email notification at the dinner table from Blue on his cell phone. The cell phone screen indicates that the time is 3:20, which is inaccurate for a mealtime because it is already dark outside and crickets are chirping when he excuses himself to go outside to get some air. (00:28:10)
Factual error: In the police shoot out scene, you can see that the plate carriers the actors are wearing are really empty. Brolin sticks his hand into Forsing's vest after he was shot, the vest easily folds away. You can also see in various shots how theirs vest bend with their bodies, in a way they wouldn't if they had plating in as they should to protect from bullets.
Factual error: The female Frankenstein tries to set Dracula up with during the wedding reception is referred to as his "right arm's cousin" but the big arm that looks like Frankenstein is her right arm. (00:08:10)
Suggested correction: Frankenstein wasn't saying she had the other half of his right arm (i.e. his left arm), just that the 2 arms came from 2 people who were cousins.
Factual error: The robbery flashback scene is at least 15 years previous to the main story, placing it circa 1953. The big lettering on the armored car uses Helvetica font, which did not exist until 1957.
Factual error: When Buster joins the card game in the saloon, he looks at the hand of the player that had just left. Given the circumstances in the saloon, the cards cannot be spot clean and white as fresh snow. Also, they seem to be plastic cards, which did not exist yet back then.
Factual error: The vehicles in the convoy are supposed to be armored since the bullet fired by 50 BMG was absorbed into the glass. First off the vehicles are standard, not up armored since the windows are standard factory and not thick ones used in up-armored cars. The highest rated armored car is B7 which will stop armor piercing not 50 BMG. Also, the windows completely shatter after being shot out; armored windows will never shatter, they stick together and chip off. (00:03:00 - 00:05:00)
Factual error: The gazette clipping at the beginning of the movie where Velma wrote her disdain for Carol is dated Thursday, March 25. Neither year when the story could be taking place based on other hints had March 25 happen on a Thursday. (00:03:50)