Other mistake: Sammy makes his film "Escape to Nowhere" with a Bolex 16mm camera. (I recognise it because I own one.) When he shows the film, we can see that it is on 8mm film.
Other mistake: Montana, like other states, has an "open container" law which prohibits public drinking or carrying an open container of alcohol on public streets/sidewalks, but Chris and Sky left the bar carrying and drinking bottles of beer, casually strolling down the sidewalk. Sky, who works in the bar, surely knows that customers may not leave the premises carrying open bottles of beer and an on-duty employee should have stopped them. Wealthy Chris might not have cared about the misdemeanor offense/fine.
Other mistake: Jamie was strangling Rose with both hands, quite forcefully, for almost a minute until his dad hit him over his head. When Rose was getting up, her neck was not the least bit red and did not show any signs of having been choked. (01:05:05 - 01:06:03)
Other mistake: It isn't clear whether Robert's gunshot wound was an "entrance" or "entrance and exit" and if the nurse or surgeon? wearing scrubs committed a character mistake - "We were worried, given how deep the bullet penetrated" but Sasha "heard the bullet passed through Robert's shoulder." "Penetrating" means the bullet entered but stayed inside the body; "Perforating" means the bullet passed through the body. In general, perforating gunshot wounds tend to be less serious and therefore less "worrisome." (00:06:23 - 00:07:42)
Other mistake: The men went to Flynn's suburban home, with houses nearby on both sides (and probably on the opposite side of the street), at night and many loud gunshots were made inside as well as outside, but no neighbors turned on lights or were disturbed. Dogs did not even start barking until the shooting stopped and Flynn was driving away. Even if neighbors heard but did not want to risk getting killed, the dogs should have started barking at the first sound of gunfire (if not when the men arrived). (00:26:08 - 00:27:49)
Other mistake: The crate, which had gaps between the boards, was buried about 8-10' deep, but it was free of dirt when it was being hoisted out of the hole. (01:14:25)
Other mistake: In an early shot that takes place at night, a woman in a restaurant points out that the radio tower has a blinking light. Later on during the night shots we see the strobe close up. The problem is, there is no electrical equipment on or nearby the base of the tower, nor are there electrical wires visible for the lighting. How is this tower still receiving power? Tower lighting is extensive, and there would at least be some form of equipment for it present at the bottom of the tower. Not to mention, tower lighting has to be maintained by FAA regulations, and it's difficult to believe a 2,000 foot tower would be in such bad shape. Considering the strobe at the top is incandescent, it would burn out often and the tower would need to be climbed.
Other mistake: It didn't make sense Catherine was a Catholic preacher but worked at The First Baptist [Protestant] Community Church" and drove a van with the same on it. (00:31:00)
Other mistake: In the origin story of Poirot's facial hair, we see the damage on his cheek is massive, well into the cheekbone. His girlfriend says he'll grow a moustache to cover it, and surprisingly, it works - nevermind the fact that scar tissue wouldn't grow hair. When we see the scar without the moustache, while smaller than the initial damage, it still extends into the cheek at the level of the nostrils in a way that the 'stache couldn't seamlessly cover like in the rest of the movie and its prequel.
Other mistake: Samantha orders a pizza around 8:20 PM, which is to be delivered within 30 minutes. Lester comes down Samantha's steps around 10:05 and various time-consuming events occur (e.g. Samantha scuffles with Lester, somehow gets Lester zip-tied in a chair, and Samantha starts torturing Lester). Blair, "Cheezy Pizza" deliverer, approaches and knocks on the door. There is no mention of the pizza taking so long - closer to 2 or 3 hours than 30 minutes - to be delivered. (00:08:27 - 00:32:25)
Other mistake: Whilst questioning Dani, Carmichael gets a text alert and immediately takes out his phone and looks at the text. The time on his phone is 10:48, but the message is shown to have been received at 10:45. Three minutes did not pass in between the time he got the text alert and the time he looked at the message, only a couple of seconds had passed. (00:51:20)
Other mistake: Maisie rides her bike down the snow-covered hill, but when she stops in front of the cabin there is no snow in or on the tire treads and the tires look dry. (00:12:23)
Other mistake: At the end the camera bulbs would not work as they are electric. This is proven when the music starts after the creature leaves the area. (02:01:00)
Other mistake: When Marilyn is standing on the subway grate and the skirt is billowing up, there is one of the takes where there is a dark spot near the front of the skirt. All others are spotless.
Other mistake: Visser was face-to-face with Omar when she shot him in the neck (looked more like it would be in his mouth before the camera shift) yet she did not get any blood splatter on her shooting hand, face, or clothes. There also wasn't much blood on Omar considering he was hit with a near-contact if not actual contact shot. (00:45:41 - 00:47:12)
Other mistake: Laura's Arizona license plate (G 652P) was, understandably, a combination or blending of the design from Jan 2008 - Apr 2020 (blue/white/yellow horizontal colors) with a serial format closer to that of the mid-1950s, but improper for either time period. The 2008 - 2020 plate serial format was "ABC 1234." Laura's 1955 plate - when the serial format was "A - 12345" - should not have had a letter ("P") on the far right. ("G" could be the code for Gila, Graham, or Greenlee County, but which one?). (01:24:19)
Other mistake: Si was kneeling on the floor, stabbing his upper left arm and blood was gushing out. After he moved his right arm with the bloody knife to his right side, the aerial view did not show any blood on the floor, across his thighs/pants, or even dripping down his left arm. (00:27:50)
Other mistake: The GPS voice said, "Your destination is on your left", but Kath kept driving (slowly) on the dirt road and did not reach the cabin for over 30 seconds (longer than would be expected). A GPS system typically announces how many feet until you reach your destination, plus "You have reached your destination" after traveling that number of feet. (00:05:00 - 00:05:38)
Other mistake: This TV-movie is set in 1934. At the county fair where a pie judging contest is about to take place, a sign reads, "Entrants...Please leave your name on the pie." The sign uses a computer-printed font.
Other mistake: When Briggs returned to his SUV after drinking in a bar, he lowered the tailgate and there was no visible rear window. (This was before the window was smashed with a rock). (00:23:49)