Factual error: Detective Summerville tells Sean that his wife got a rental Kia from Budget paying in cash. But Budget does not allow the initial cost to be paid in cash; the payment must come from credit or debit card, cash can be used only as the last payment when you return the car. (00:37:30)
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: 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: 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: At the beginning 'researchers' are working on the 60th parallel in the province of nunavut. Nunavut is not a province; it is a Canadian territory. They appear to be working in the winter. At the 60th parallel, the winter would be almost dark and the sun would never be that high in the sky. Given that sun, it would be summer. In the summer, you would not have that snow cover.
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: 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: There are no law enforcement agencies referred to as "Mounties" in Alaska, or any elk.
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: 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: 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)
Factual error: Cat Rivers is flying the R44 helicopter from the left seat. The R44 is a single pilot helicopter fitted with dual controls. Two collective levers may be installed (the left is removable) but the cyclic control is not of a conventional nature. This comprises a central stick terminating in a pivoting T bar, which only allows one of the pilots at any one time to control the cyclic with the hand grip in the 'normal' position. The R44 is normally flown from the right seat; it is possible to fly from the left seat and instructors regularly do so. Students and low experience pilots would normally only fly from the right seat, and are discouraged from flying from the left seat when with friends. This is because of the unusual cyclic control configuration and, to some extent, the different instrument scan and visual references for hovering when flying. (00:14:40)
Factual error: When Lukas takes Sarah to school (on Friday or only a couple days after taping his laceration), the laceration is much smaller (practically healed) and there are only three strips of tape. A laceration as wide as the one Lukas had would not heal within a couple, few, or even several days. Also, the way Lucas taped his laceration would not yield the same/similar results as sutures (even closure and faster healing with little scar). (00:15:43 - 00:16:31)
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 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: Spoiler! The cultists burned Mandy alive by wrapping a sleeping bag around her, putting gas on her and hanging her from a metal swing set and setting her on fire. After Red frees himself later and craws up to her remains, it's shown that she is barely a pile of ash with her skull still somewhat in shape when he picks it up. It then crumbles into just ash showing she had been fully burnt to the very center. This would not have been the case with how they burned her. Their was nowhere near enough heat or kindling to keep her body burning long enough to turn completely to ash with no remains like that. She would have died, yes, but would have mostly stayed intact as a single body burnt very bad. Bones, features, charred organs would still have been left behind. (01:04:00)