Continuity mistake: In Madrid Bourne calls the emergency line and says he's in 334 Norte street, which triggers cops to show up. When Bourne arrived at the building he looked at the door and it was a 2 digit number which one can faintly see it starts with a 1. (The filming location took place at number 10 Virgen de los Peligros street).
Continuity mistake: When Jessica finds the gift box of roses outside her apartment, there's a closeup of the card signed "Ray", then a few shots later in the next closeup of the card the signature "Ray" is entirely different. (00:56:00)
Continuity mistake: At the trial, the defence lawyer puts a dollar bill on the witness box while he is questioning Annie, which keeps moving, without anyone's help.
Continuity mistake: Inside Lord Peel's study, Poirot asks Lady Westholme what did she do after lunch, since "You did not immediately go for your walk, I believe." Peter Ustinov poses the question with his hands behind his back, but Lauren Bacall's answer answers with the stand-in for Ustinov posing with his hand on his hip. (00:54:40)
Continuity mistake: At the start, Simone puts the rubber tube round her arm. Camera cuts - it's no longer round her arm and she puts it round again. (00:03:35)
Continuity mistake: After Chloe runs off into the woods and the other two girls finally find her after she's had her run in with Slender Man, they are shining the flashlight in her eyes and asking her questions. In one shot her eyes are still open as she gazes near blankly off in the distance. When it cuts to a close up and suddenly her eyes are tightly squinted shut. (00:38:45)
Factual error: When Watson is pinned down by Moran at the arms factory in Germany, he hides behind a large artillery piece. He looks around and sees a pair of hearing protection. They appear to be modern hearing protection ear muffs, wrapped with cloth to make them look period. They have plastic clips to detach the ear cups from the metal band, which gives them away as being modern. They appear to be Peltor style hearing protection.
Continuity mistake: We see that when Pat's host leaves the room, there is a pink bag sitting on the side of the table, to the right of the window. Later, when Pat walks over to the window, the bag is now gone. (00:08:20 - 00:10:00)
Continuity mistake: When Max is going to stab Naoko at the end of the movie, he grabs her by the hair, but in the next shot he's grabbing her by the chin. (01:18:30)
Continuity mistake: Talking with the feds about the case, Cross says "This guy's a collector." Kyle Craig in the background goes from holding a pad to a folder, and then closes it multiple times when it was closed to begin with. (00:24:00)
Continuity mistake: When Julia is explaining the conspiracy to Rick in the stairwell, the position of Rick's hands in front of his face change between shots. (01:03:25)
Continuity mistake: When Frank Walker and Casey Newton get into Frank's bath to escape the robots, Frank gets in on the left and Casey gets in on the right. They get shot off but when they land in the swamp, Frank is on the right and Casey is on the left.
Visible crew/equipment: Towards the end, when the Dude starts getting angry after Walter accidentally scattered the ashes all over him, you can see a black wire under the Dude's shirt going into his pants, most surely a microphone.
Continuity mistake: When Don Knotts is in the old Simmons mansion, he falls down a chute of some kind. If you watch closely you will see the stunt person looks nothing like Don Knotts. It is a younger man with very straight hair.
Continuity mistake: After Bill punches the door open at the end of the alley, the old couple get up and escape. There is a wooden barrel and trash in the corner where they were hiding. But moments later when Batman breaks Bill's leg, the corner is seen behind him and the barrel and trash are gone. (00:05:15 - 00:05:55)
Continuity mistake: The cursed necklace is shown emitting its evil fumes on the white paper of the letter, but the letter itself is perfectly 90° with the envelope, or at a different angle. (00:06:20)
Continuity mistake: When Barry tells Ray to go check if the fisherman is alive, Barry's flashlight keeps changing position from his right hand to his left hand. (00:15:58)
Continuity mistake: Myra Bruhl is popping pills at the beginning of the movie; when she puts down the container, there's a white-labeled bottle on the bedstand that was not there before. (00:02:40)
Continuity mistake: When Lucifer confronts Thomas, Lucifer forcefully pulls him closer and puts his right hand on his chest, but the close-up shows that his hand is under Thomas' arm. (01:21:20)
Factual error: The girl in Ed Warren's hospital room is wearing a UConn sweater with the wordmark from their 2013 logo rebrand that had not existed anywhere near 1981. (00:21:30)