Plot hole: When Rupert brought his "secret pen pal" letters from Hollywood movie star John to school, they were stolen by some classmate bullies (and apparently never recovered). Rupert would have been around age 11 (possibly 12) at the time. It is inconceivable that a child could recall enough details from the letters to write a book about them 10 years later.
Visible crew/equipment: When Zoe walks into Anderson's office and tells him she's meeting Maya at the apartment, just as Zoe says, "Uh oh," there's a visible blue T-mark taped to the floor. (00:49:05)
Revealing mistake: The anchor rope around Maddy's neck is loose enough for her to remove.
Revealing mistake: When Bu is packing up his things in his bedroom, the camera appears to sway abruptly from side to side two or three times during the scene, almost as if the cameraman couldn't keep the camera steady. (00:57:25 - 00:57:50)
Continuity mistake: The scene after the one where Ben makes his special sandwich begins with Holly preparing bedazzled wings for her younger daughter. The actress raises her left hand to cover her mouth, but in the next shot it's the right hand instead. (00:16:50)
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.
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)
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: 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)
Continuity mistake: When Dave and Meg are at the park/campus talking and come across a sculptor, they begin to talk while stopped, watching. Several times Meg's head changes from looking at Dave to watching the sculptor between shots.
Factual error: An ambulance is shown. This movie is supposed to take place in a latin country. But the ambulance says "Ambulance" in English, and worse, it also says "Riverside County." Also, the red cross emblems on the attendants' backs say "Comite" in Spanish, "International" in English, and "Geneve" in French. (00:28:55)
Continuity mistake: Whilst driving back after meeting with Paul Castellano, Gotti has his hand on the driver seat headrest in some shots, but in others his hand is on the seat. (00:35:05)
Continuity mistake: Jeffrey downs all his whiskey, but in the following shot his glass is still half empty. (01:35:50)
Continuity mistake: In Alice's apartment the clock on the wall has the time as 8:40 when she is standing and kissing David. They have sex and Veronica comes over. Alice and Veronica talk and the clock still shows 8:40. (01:20:00)
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.
Other mistake: During the murder in the stairwell, an old woman opens her apartment door outward, and Varg kicks it shut. Apartment doors always open inward, as did Euronymous' apartment in the same building.
Suggested correction: Euronymous' apartment door opens outward into the hallway, at least in the final scene it does when he's trying to get away from Varg.
Continuity mistake: Constance is hugging Mary. In the close up shot, Constance is wearing a round sky blue earring. In the long shot, the earring is not seen even though her ear is fully facing the camera. (00:27:45)
Factual error: The police officer that shows up does two stupid things in a row that real police would never do. When investigating a kidnapping, he calls in what the car was they were looking for. Which he sees. Instead of calling for back up, or even mentioning to dispatch that he found a car that looks like it, after coming from a murder scene at a gas station and following a map left behind to this spot, he approaches the car alone, without calling for back up, or drawing his weapon. Shortly thereafter, he finds the kidnapped boy inside the car, who tells him the man who took him is in the house. The officer then proceeds to go into the house alone to look for a dangerous kidnapper without waiting for backup, even mentioning to the kid that his partner is on the way. (00:32:00 - 00:33:35)
Continuity mistake: In the first WW2 flashback the protagonist is handing the various items to the Nazi doorman. When he puts down the pen, he is doing it with a left hand in the table close-up, but he picked it with his right, as the left arm is busy holding the coat. (00:02:05)
Continuity mistake: Ron Perlman and Famke Janssen are having dinner on his supposed birthday. The whole meal has several continuity errors, with her fork being at different heights, sometimes replaced by the wine glass, etc. (00:34:30)