Revealing mistake: After the woman is strangled and the people come in trying to find the little kid, the dead woman is clearly seen blinking. (00:11:25)
Factual error: As the kidnapper is watching TV, we hear a news anchor describing the kidnapped child. She is described as 12 years old, 3 ft. 5 in. tall, and 52 pounds. This is the size of a child half this age. A 12 year old of this size would be freakishly small, which this character is not. And as we see her throughout the movie, she is easily approaching 5 feet tall and in the 70 - 80 pound range. (00:13:30)
Continuity mistake: In the opening scene where Alex's partner is in the car with the bad guy, when she pulls her gun and he hits the brakes sending her into the dash she is not wearing a seat belt. Immediately after, when the car goes over the side of the dam, the shot looking down on her shows her with a seatbelt on, the reason she didn't fly from the vehicle. (00:04:10)
Factual error: When Alex & Jezzie are on their chase throughout the city they end up at Union Station. The scene is really filmed at Union Station, however when they go downstairs to get on the train, as instructed, they are no longer really in DC. The train used is not DC's. Platforms are not marked by letters or any other designation in DC and the interior of the train car (layout of seats etc) is that of Baltimore's, rather than DC's.
Continuity mistake: Towards the end of the movie, Jezzie is shooting through a door, trying to kill Megan. She has a black Glock pistol. When she reloads the gun, it magically becomes a silver Smith & Wesson pistol. Then, when she walks up into the loft of the barn, the gun again is a black Glock.
Continuity mistake: When they are in the classroom and the lady is on Megan's computer and says to Alex to come there and look, he is in front of the teacher's desk but when it pans back to Alex it shows him walking around the back of the teacher's desk and down the far side of the room. Why not just walk down the main isle where he was at? (00:31:30)
Continuity mistake: After Freeman and the Main Detective girl are at the beach looking at the body of the man who was shot in the water trying to save the little girl, Freeman says "let's go back to the city". On their way back in the car, of the three times the camera is on him, he only has his seat belt on twice. (00:50:00 - 00:51:00)
Continuity mistake: At the beginning of the film when Freeman's partner shoots the guy in the Corvette and the car starts flipping, the right front tyre is shown coming off the car and tumbles in the air several times, but when the car is finally getting tangled in the guard rails, it shows the car with still 4 tyres on. (00:04:15)
Continuity mistake: During the "running game" segment, Cross gets a cell phone that uses an earpiece and is told to keep it (for further instructions). When he gets to the subway loading platform, he gets another call, but he is not wearing the earpiece while he listens to the new instructions. Soon after that he is shown wearing the earpiece again while he listens.
Continuity mistake: Morgan Freeman is sent off on a race on foot to various locations around the city and given a time limit to arrive. The addresses of each of the spots he must be at in a given time period are listed, but based on their locations, there is absolutely no way a person could get from one location to the other in the time given. There was a considerable amount of backtracking and it just wasn't possible, especially the last bit, from 12th and Madison to Union Station, 1.5 miles in 4 minutes.
Continuity mistake: When Morgan Freeman is talking on the phone with the kidnapper, he says (referring to Megan), "Do you have trouble saying her name?" Two minutes further into the movie, in the car, when he plays back the tape of the conversation, he is heard to say "Do you have trouble saying THE name?" (00:16:25)
Factual error: The 'game' set up by Soneji is a whole bunch of computer science-fiction nonsense seen only in movies, with the common factual error of blurry pictures that can somehow be zoomed in ad libitum. The IT agent comments when Cross has clicked on a picture from the camera recording of the class; "Dr. Cross isn't in cyberspace anymore! You're at a live site, looking through a video camera", which does not even make sense. The sequence that follows is not a camera feed, with a real camera being moved, but a panoramic composite shot of the room.
Plot hole: The kids in Soneji's class use an encrypted GIF algorithm to pass notes to each other and that "drives the teachers crazy", since they are unable to catch cheaters that way. But how do they do that? Easy, they have a message system in place installed on their workstations, that warns them with a big pop-up that they've got "A new message"! It would be easy to sanction and prevent the cheating by simply removing the chat application, no matter if they use it to chat directly or pass Michael Jordan photos as shown in the movie, which they have no business doing during an assignment anyway.
Continuity mistake: In the scene where Alex and Jezzie are waiting for the kidnapper to show up to get the president's son, Alex says that Jezzie can smoke. She proceeds to roll down the window and light her cigarette. When the camera pans back, the window has been rolled up.
Revealing mistake: Cross is between the first two steps of his tour de force following the instructions for the diamond delivery. McArthur says "Unit six, take "K" Street and double back", and we are shown Jezzie in her vehicle. She moves cutting through a traffic island with a forbidden maneuver, and yet you can see on the asphalt wet marks of 'someone' doing the exact same thing before her recently (obvious residual of the previous take). (01:06:30)
Continuity mistake: Cross just boarded the train. At the entrance, featured prominently, there's a woman with headphones. To the other side, there's an old pudgy man with a beret, and a black guy in a dark brown suit, looking all serious. Morgan Freeman is between these two guys, but in the POV that follows they are both on the same side, in front of him. (01:09:25)
Continuity mistake: Dimitri calls Jezzie from the gates of the embassy, and she leaves Cross and the guy talking in Russian to go to him. During the transition, the soldier moving across the gates walks through the same steps he already walked, and the bodyguard in a trenchcoat is in a different position. (00:59:25)