Continuity mistake: When Bennett gives David Stutler the red handkerchief David has no ring. When David opens the handkerchief he is wearing the dragon ring in the shot and then it disappears in the next shot. This occurs after Horvath has taken the ring from David in the previous scene.
Continuity mistake: After Kyle dies, Audrey jumps off the diner's roof and starts shooting at the possessed people. She runs out of bullets and gets into the blue van. One of the possessed scratches the top left corner of the windshield. These scratches disappear. (01:09:45)
Factual error: In the very first shot of the movie, a clock is shown ticking. The time on the clock reads 05:59:56. It is obviously AM because a few seconds later at 06:00:00, Frank wakes up as if it was morning. As Frank sits up, clear daylight is visible outside of the window. This scene is supposed to be set during winter. We know this because there are many Christmas decorations. Since this is meant to be winter, it should still be dark at that time of day. (00:00:40)
Suggested correction: At the beginning of the movie it's September or early October if latest in the year. At Cleveland's latitude there's enough sunlight at 6am to experience such lighting through a window facing south.
First, what in the film places the opening scene in Sept or Oct? There's too much snow on the ground for it to be either of those months (it doesn't snow in September and rarely in October, but only late October). Second, even if it was set in October, the sun doesn't rise until around 7:30AM or 8:00AM.
I disagree. I think what Bishop73 wrote above is correct. The opening scene at 6:00 AM showed daylight, which would be too early for October, November, and December in Ohio. The movie apparently begins in December based on the amount of Christmas decorations in the neighborhood. Sunrise might be between 7:30 - 8:00 AM and twilight is about 30 minutes prior to sunrise. It simply would not be that light out at 6:00 AM.
Continuity mistake: After Claire and Phil steal Holbrooke's car, they pull over to the side of the road to talk about their marriage. They both have seatbelts on at first, but in several shots Claire does not have her seatbelt on, while in other shots she does.
Other mistake: In the scene where Jensen is attempting to decrypt the password on the hard drive with the algorithm, he uses the command "traceroute d-hea" which is commonly used to test network connectivity, not decrypt passwords.Then follows it with the command "dir" to reveal HTML code instead of directory structures.
Continuity mistake: In the getaway scene where Charlie Wax (John Travolta) reverses into a line of cars to destroy James Reese's SUV, when the SUV explodes the wheels on the SUV change to a stock rim, when it had large custom rims when he parked it.
Continuity mistake: During the fight at the End of the Line Bar, Gem walks and stand next to Castor. Later she move to the left and sits on a couch for the rest of the fight. However, at the very beginning, right after Quorra jumps and protect Sam, there's a brief cut where we can already see her sitting there, too early.
Visible crew/equipment: When Bob, and the children go to the Chinese restaurant, a crew member and boom mic appear in the reflection on the car.
Visible crew/equipment: When Lucas goes backwards towards Calin to play chicken causing him to wreck, Lucas does a reverse 180 and during that moment a chase pickup with camera crane in front of Lucas is visible. (01:15:00 - 01:16:00)
Other mistake: Spencer tells Jen to meet him at sunset but when they meet, it is not sunset.
Plot hole: When Andromeda and Perseus wake up on the beach, Andromeda tells Perseus that Argos needs a new leader/king. The problem with this is there is nothing onscreen to show that she even knew her father the King had died. She was hanging by her arms facing the Kraken and she couldn't turn around. By the time her father died, she was already falling into the sea, so again, she shouldn't even know her father has died.
Other mistake: Finbar is shown torturing a victim while the victim has his head in a halo used for immobilizing a person's head. The screws to hold the victim's head tight can be seen not to be touching his head, yet the victim is still bleeding from the screws.
Continuity mistake: During the car chase between Fitch and Diaz, Diaz's truck changes from a Suburban, to an Explorer, to an XL-7.
Continuity mistake: In the beginning when Shane and Diggs arrive at the hostage site Shane sticks a toothpick into his mouth. However, in the next shot the toothpick is missing.
Factual error: The construction of Hadrian's Wall as shown at the end of the film is not historically accurate. A wooden wall was constructed first with a deep ditch on either side. One of the ditches should be visible as the characters approach the wall but it is not. The stone wall shown being constructed was not added until later and then it was constructed in sections. It did not become a continuous stone wall until some years later. In addition, the stone wall shown is not wide enough. Hadrian's Wall is around 2 meters wide at the top and even today you can comfortably walk on top of it.
Continuity mistake: When Jake goes into the water with the tow rope around his waist, the rope is going over the top and through the railing of the boat. When he gets pulled away with the girl, the rope is seen down in the water.
Continuity mistake: The sweat stains on the phone costume keep changing when in the police station. (00:12:00)
Continuity mistake: In electric avenue scene, the number of wood bars the cast has to go around changes from two to four.
Continuity mistake: The blood spatter on the CCTV footage from the first shooting is a lot smaller than when the incident occurred. (00:14:45)