Character mistake: When Cyrus and Johnny-23 are talking they both pronounce the Spanish version of Johnny-23's name as Juaniyo. That is not how Johnny is pronounced in Spanish. It is pronounced Juanito with a T. Normally I would have chalked it up as a language barrier but Danny Trejo is of Spanish ancestry. He should have known better. (00:20:41)
Character mistake: Right at the beginning of the movie, introductory technobabble. "In this canister, there's a solution of protons. The canister is attached to a rotor circuit that generates the protons to the speed of light." I believe the science genius and creator of time travel mixed up the words "generate" and "accelerate" here. (00:00:50)
Character mistake: Poirot identifies Prof. Hardman's revolver as a 1927 police-issue weapon due to its blued finish and chequered grips. In fact, these features were common in the widely-available civilian versions of the Colt 'Police Positive' revolver and not the least bit specific to police-issue weapons.
Character mistake: Queen is an attorney and should know how to conduct herself as a passenger in a car pulled over by police, yet she fails to behave in an acceptable way. Even though certain things may be permissible under certain circumstances, a lawyer should know exceptions and extenuating circumstances, but she apparently does not. She did not have the right to interfere with a police officer and "demand to know" or get out her cell phone to record if she was told to keep her hands where he could see them. (00:10:25)
Character mistake: McQuarry enters the subway at the 103rd Street station on the 1. He is transferring to the 2/3 at Chambers Street when Bose approaches him. However, it makes no sense to transfer here. As someone who knows New York, McQuarry would transfer to the 2/3 at 96th Street to benefit from the express ride to Chambers. (01:03:05)
Character mistake: During the planning stage, the Virtuoso said (narrating), "You have to hit a two-inch moving target on a car going 60-plus miles per hour from 50 yards away." He was watching the CEO drive past the window to where he parks in front of his business. The CEO was shown taking a sharp turn at the intersection and squealing his tires, but the location was inner-city with short blocks and traffic lights. Downtown busy streets with pedestrians do not allow (or enable) drivers to reach high speeds. (00:10:30)
Character mistake: When the high roller Ikachawa returns to The Tangiers, Rothstein said he's betting $1,000 instead of his usual $30,000, so when he won, it didn't feel like he had won $10,000 (10 $1,000 bets), but felt like he lost $90,000, alluding to the fact that betting 1/30th of his normal bets made him feel even though he was winning $1k a hand he was missing out on the other $29k, or losing that. At ten hands won, at $1k/hand, he really would have felt like he was losing $290,000, not $90,000 as Rothstein says.
Character mistake: The letter from the FBI containing the results of the blood and semen test is filled with numerous typos. First, on the line "Subject: Result of examination requested", the word "examination" is misspelled "examnation." Second, the term "DNA instrumental analyses" has "instrumental" incorrectly spelled as "insrumental." Third, the line "Reference: Letter dated October 21, 1987", has the word "dated" misspelled as "dateed" and the month "October" misspelled as "Octorber." (01:58:35)
Character mistake: Lisa is testifying about the 1963 Pontiac Tempest and the 1964 Buick Skylark being the same height, width, and wheelbase. While the Tempest and Skylark shared the same components, the 1963 and 1964 models were quite different from each other. The 1964 Skylark and Tempest moved to a 115 inch wheelbase and a larger body and frame. The 1963 Skylark and Tempest were smaller with a 112 inch wheelbase. An expert as she claims to be wouldn't confuse the two.
Character mistake: In the final scene of the film where Axel is leaving, and Taggart says "See you around." when Axel turns around to start driving he says "Be cool Rein..." He accidentally uses the surname of the actor, Judge Reinhold, who plays Billy Rosewood. However he cleverly tries to cover it up by trailing off his sentence as he knows he has made the mistake. (01:34:15)
Character mistake: Reacher asks the MP Sgt who her "DI" was in "boot camp." The Army doesn't have Drill Instructors or boot camp but rather "Drill Sergeants and Basic Training." Call a drill sergeant a DI and you'll be doing push-ups, seen it happen.
Character mistake: When Francis Allen is being interviewed by Reagan, Allen presents Reagan cell phone pictures of himself on a yacht to support his alibi. Allen says "the time and date are on the top of the screen, you saw that, didn't you Reagan?" and Reagan agrees. However the date is seen at the bottom of the screen, not the top.