Factual error: After the naval battle, Thraex is waiting for an informant who tips him off about Lucilla and Marcus Acacius's plans. And of course, as a well-educated gentleman of 200 AD, he kills time by reading the newspaper. Wait, what? Needless to say (to anyone but Ridley Scott, probably), ancient Romans wouldn't/couldn't exactly get their news by newspaper, the press having not been invented yet. This one looks so modern in its layout it even has headlines and a proper publication title, "Roma Viridia."
Factual error: In the diner, the kids listen to/dance to Britney Spears' "Toxic," which didn't release as a single until January 2004. This takes place in 2003.
Factual error: The movie, by various accounts, takes place 300 years after the apes took over and humans were rendered "dumb" (both literally and in the (non-PC), mute meaning of the word) or went underground. But yet they're making contact with a communication satellite. Satellites don't function for 300 years; they require occasional course corrections to keep from entering the atmosphere and burning up. Course corrections require propellant. The propellant wouldn't last 300 years. And the electronics.
Revealing mistake: When Elly is "skating" on the black oil while fighting the bad guys, we can see that it is Bryce Dallas Howard's stunt double in a few shots where it briefly shows her face.
Continuity mistake: When Jessica kills the sniper with the rock at the beginning, the sniper's body is lying dead on the ridge. When she shuffles down the dune to speak to Paul, mere seconds later, the sniper's body is no longer there. (00:09:04)
Continuity mistake: When Deadpool is talking to Wolverine's skeleton, in one shot the skeleton's mouth is closed, but in the next shot it is open.
Continuity mistake: GUN was formed during the events of Sonic the Hedgehog 2. In the Knuckles series, the Buyer stated that GUN had existed long ago, under a different name. However, in the flashback in Sonic 3, the door of the laboratory that Shadow was in has the GUN logo.
Continuity mistake: In the staff room of the toy store, Callum gives Jack his Monopoly box to hold. The box does a 180° spin between shots, twice.
Factual error: The characters are using Channel 9 on the CB radios, which is a reserved channel for emergency use, not civilian use for communications.
Continuity mistake: When Bobbie Jo holds up the jar with the spider in it and tells Hellboy that she got the cargo back, he is looking straight ahead towards the wall of the church. In the next shot angle, he's suddenly looking at her face. (01:29:16)
Visible crew/equipment: At the start, when the giant egg falls next to Loann and she runs away, the camera and cameraman are reflected in the garage door. (00:00:54)
Continuity mistake: Kraven casually sniffs a couple and ruins their relationship. He then sits down with his brother; Fred Hechinger's hand keeps changing position between shots, holding a fork or not.
Factual error: Someone shouts "jobsworth" at a London Underground official. This term is first recorded in 1970. The film is set in 1940.
Continuity mistake: When Eddie and Martin meet for the first time in the woods and they are having a conversation, Rhys Ifans wears his necklace with the pendant above his clothes in the majority of the shots, except the ones when the camera is focused on Tom Hardy and he is facing left. In those shots, the pendant is under the T-shirt.
Continuity mistake: After the bad biker bites Noel, he removes the rearview mirror from the windshield and smacks the bad biker with it. However, when Noel tells Katie to drive the car, in the exterior shots as she sideswipes another car, the rearview mirror is back up on the windshield; then it's off again. (00:33:35)
Factual error: The insignia on Staff Sgt. Branson's uniform is incorrect. The insignia on her camouflage blouse is for a US Army Staff Sgt, not a US Air Force Staff Sgt. (00:03:58)
Visible crew/equipment: When the 6 main characters open the hatch to the sewer, there appears to be a crew member helping them open it. There is only 6 of them in the scene. But, there is a seventh person at the top who looks to be wearing a m95 mask. This is also in the opening scene of the first trailer.
Other mistake: When Abbott is talking to Axel for the first time, he is flipping through a book that has files and pictures on Axel. One of them is a picture from when he got arrested after he got thrown out of the window. It is made to look like it was a picture taken of him at the time of his arrest, but it is a direct screen grab from Beverly Hills Cop.
Continuity mistake: At the gas station, Thelma and Ben are talking to random people Thelma thinks she knows. Meanwhile, her family is on the way there. The sun is going down in this sequence and it's noticeably getting darker. Before they run behind the building, it's suddenly lighter outside and gets darker again.