Continuity mistake: When Sgt. Howie inspects the register at the school the first shot of the Beltane Term page shows Rowan Morrison's address as 'The Tuck Shop', when it switches to a closer panning shot her address is changed to 'The Post Office'. (00:32:50)
Continuity mistake: When Ellie falls from the tree after the rope from the tyre breaks, Louis runs with his wife to see how she is. Louis is wearing a plain white crewneck T-shirt with the sleeves rolled up. When Rachael yells "Gage!", you now see Louis wearing a striped white unbuttoned collared shirt and sunglasses. When Louis is running for Gage, he's back to his plain white T-shirt with the sleeves rolled up. (00:05:40)
Factual error: The solar panels (or mirrors) are facing away from the sun. The sun's position can be estimated from ground shadows and object highlights and the panels are facing in completely the wrong direction. (01:11:40)
Character mistake: At the truck stop, Mark (young Damian) meets with Martin. Martin tells Mark that he had the shedding pills reverse engineered and hands him a piece of paper. The percentages of the 5 ingredients only add up to 90% rather than 100%. (01:29:25)
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: Joe is looking through his yearbook while Marie chats with the old headmistress. He finds the page with Adrian's photo. At first, the name under the photo is Adrian Pryce. In the closeup shot, it now reads Adrian Doyle Pryce. (01:12:20)
Continuity mistake: In the shot where Mattie walks towards the toilet at her school, you can see there's a pencil in her hair pointing downwards. When she's inside the toilet, the pencil's direction and her hair have both changed.
Continuity mistake: During the demonstration with the billiard balls as 'Indians', the balls are placed differently on the table depending on the take. (00:37:00)
Continuity mistake: The roof of the Chessman House changes, going from having a middle roof to no roof in the middle.
Continuity mistake: When Dani is looking at Simon and Connie complaining to Ingemar after the female elder jumps off the cliff and they turn back to face towards it, Christian says "Oh my God" realising the male elder is about to jump off. At this moment, he has his left hand over his mouth and his right hand by his side. The shot then cuts and Christian now has his right hand over his mouth and his left hand on his chest. (01:10:55)
Continuity mistake: In the classroom when Peter is being possessed, he slams his face down into his desk twice, splattering blood onto it. After he falls back screaming, the camera changes angles and now his desk is clear of blood. (01:38:25)
Continuity mistake: When Holland shows the bartender the dollar bill in the shape of a shirt, he is smoking a cigarette before he takes the cigarette out of his mouth. Holland mentions to the bartender that he made it himself, with nothing in his mouth, but in the next shot, the cigarette is suddenly back. (00:09:45)
Continuity mistake: Parker filled a beer pitcher and there was very little foam. After leaving from behind the bar, the beer pitcher was half foam. (00:20:50)
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 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.
Other mistake: After the third homicide, everyone gathers around the statuettes of the ten little Indians. Small problem, though. There are eleven little Indians. (00:42:20)
Continuity mistake: During the first meeting between Lou and Madeline Kahn, her fur stole changes position between shots almost more often than she changes names. (00:09:30 - 00:10:30)
Visible crew/equipment: When Angel walks on the sidewalk to the café to meet Louis Chyphre, there's a car passing close to the shot on whose window a crew member and the cameraman are reflected. (00:25:33)
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: When Sook-Hee is standing outside in the rain before leaving, she is shown holding an umbrella whilst it rains. She walks over to say goodbye, whilst still holding onto it. A second later, she leans in to kiss a baby on the head, and the umbrella is no longer there. It is shown later that she placed the umbrella on the ground, but she was not shown doing this earlier in the scene. It just disappears in between shots. (00:02:20)