Character mistake: The commentator says "avalanche of power shots by Ivan Drago." Viktor is the one in the ring. Ivan is the father. If you have the subtitles turned on, it even says Viktor in the subtitles instead of the spoken name, Ivan. (00:55:45)
Character mistake: During the opening raid of the FSB safe house, an operator is seen taking hard drives out of a safe. As he does, he states over the radio that they are "SSDs" (Solid State Drives), when in reality they are normal HDDs (Hard Disk Drives), which are noticeably larger than SSDs. (00:07:25)
Character mistake: Dave's wife refers to McCall as his "Army buddy" - but the pictures in McCall's house on the shore show him to be a Marine. Not a generalisation a Marine would make.
Character mistake: When Logan tries to use both his and his mom's phones after her fingers were broken by the Man in Black, he throws them in disgust when he finds the SIM cards have been removed. However, every cell is capable of placing a 911 call regardless of whether a SIM card is present or not.
Character mistake: At the beginning they refer to the G8. Russia was removed from the group in 2014, making it the G7. (00:07:20)
Character mistake: After Wade is going over the second clue in his mind and trying to figure out what part of Halliday's past is he trying to escape from, he looks over the wall of article clippings and notes he has hung up. When the camera stops on Karen Underwood's obituary, there is a hand written note beside it listing movies set in New York, with the sentence "Set in New York" underlined. This apparently him looking for clues in films set there for the race challenge that is in Manhattan. However, one of the films he has written on that list is Mad Max, which takes place in Australia, not New York. (00:35:00)
Character mistake: Thor calls Nidavellir "Nivadellir" the first two times he mentions it.
Character mistake: When Anastasia has to make out the 5 million dollar check to "cash" to get the money to release Mia, she signs the check with her old last name, "Anastasia Steele" instead of "Anastasia Grey", which is written on the top left corner of the check.
Suggested correction: A key point in the movie is how Christian is upset that she didn't take his name in her work life, so it wouldn't be unreasonable that she signed the check using her maiden name (it also could have been just as easily a force of habit thing, it does take time to get used to using the correct name!).
Character mistake: Sandra Bullock's German is very good, but not perfect. She says about her husband, "Gestern hat er seine Schuhe in den Gefrierschrank gestellt," ("Yesterday, he put his shoes in the freezer"). Immediately afterwards, she says "seine Schuhe ins Gefrierschrank," ("He put his shoes in the freezer"). The word Gefrierschrank (freezer) in German is masculine and can never be preceded by the accusative case contraction "ins", the contraction for "in das." She just changed the gender of the word Gefrierschrank (freezer) from masculine in the first sentence (correct) to neuter in the second sentence (incorrect). (01:40:05)
Character mistake: Dumplin' is looking through her aunt's belongings, and finds an old application form for the Miss Teen Bluebonnet pageant. The application has an August 1993 signature but marks Lucy's DOB as 5/5/79 with a stated age of 16: it does not add up, as she'd have been 14 instead. Granted, it's an application she never actually turned in and not an official document, but this does not justify the mistake in the context of the movie (not to mention that had she just been too young to participate, the point of the movie would be moot).
Character mistake: If the nuns in the Abbey weren't real and were created by Valek, why did Valek get one of the nuns to explain to Sister Irene the exact way to defeat her?
Character mistake: During an intermission following Dmitri's revenge after the attempted hit on him, the Chief of staff discusses the data with Dr. Updale. There's a pie chart in the screen in the background, and the segments are; 5%, 25%, 16%, 14% and 50%, which add to...110%. It's not a pie chart, it's a pie and a slice. (00:50:15)
Character mistake: When George throws one of the soldiers through the cockpit door of the plane, you get a brief glimpse at the pilot and co-pilot, both of which are wearing a Bose headphone/mic set. However the co-pilot has his one backwards, with the mic bent from the right side when it's meant to be on the left. (00:44:50)
Character mistake: Zoe states that Lilly's condition is very contagious and will spread through the camp if they don't go out and get the proper medical supplies they need. She puts Lilly in quarantine... and then proceeds to visit Lilly with no protective equipment. No mask, and even touches Lilly with her bare hands before going back out to the rest of the people. (00:19:20)
Character mistake: When recruiting Burt to help repel the Graboid attack in the arctic, one of the team members says he's ideal for the job because of his experience hunting them on two continents, a reference to the first two films (Nevada and Mexico in North America) and Tremors 5 (Africa). However, this repeats the mistake in Tremors 5 in overlooking the Argentina incursion stopped by Burt at the beginning of Tremors 3, which gives him experience fighting Graboids/Shriekers/Ass-Blasters on three continents, not two. Burt, himself having overlooked Argentina in Tremors 5, does not correct her. And it's not as if the film is completely ignoring Tremors 3, since it shows the flashback of Burt being swallowed by a Graboid in that movie, which is how he got infected with the deadly parasite killing him here.
Character mistake: Marion tells Robin "he chose you for a reason", despite not previously knowing that Robin was The Hood. So she has no reason to know that John chose Robin.
Character mistake: When Riley is laying in the hospital bed and the detective introduces himself he addresses her as "Mrs. Norris." Her name is Riley North.
Character mistake: Daphne's mother is the one who pressed her husband to tell her the truth, but she is cheering when he says about the basketball anecdote that it was 'real', when later he corrects himself saying "real-ly me, disguised as a mascot." (00:17:25)
Character mistake: Immediately after the crash, when Reeves is carrying his youngest child Sophie, the actress opens up her mouth, even though she has already drowned. (00:14:43)
Character mistake: At the beginning of the movie you can read the rules of the premises, in particular rule number 3 says; "No guns or any type of weapon permitted through the gates." However, the Wolf King's cronies dump their guns before the gate even when they were never supposed to be able to come in (so does Burke at the beginning, but he was trying to be admitted in). (00:07:15)