In the early restaurant scene, Kate is wearing a gray jacket and carrying a purse with a shoulder chain. Both inexplicably disappear when she goes to the bathroom, but return when she leaves.

At around 46 minutes Detective Vicars closes Lindy's file and the file is open in the next shot.

In the scene where Mindy is in the Army and fighting with pugil sticks, the Sergeant is clearly seen wearing a red beret yet when he is knocked to the ground, the beret that then falls next to him is black or dark blue.

Lindy steals a McLaren 600LT Spider car and has difficulty with the stick shift. However, McLaren road cars use automated transmission operated by push buttons, glimpsed in the scene. The shift lever shown appears to be out of an old manual transmission Ferrari.

Detective Nevin states she can tell Lindy is driving a McLaren 600LT Spider by the engine sound, when it is impossible to tell a convertible from a hardtop from the engine sound. Both the 600LT hardtop and convertible (Spider model) share an identical engine and exhaust setup.

Despite taking place in the US, several cars are seen that are not sold there such as the Iveco Eurocargo and the Peugeot 408.

Throughout the movie Lindy's pupils are shown constricting when she is flooded with cortisol - in reality, cortisol causes the pupil to dilate.

When Lindy is meeting her date at the restaurant, he tells the waitress that he's allergic to nuts, but she refuses to leave them off, claiming that it's restaurant policy. A real restaurant would never do this, as they would be held responsible if a customer died from anaphylactic shock.

Whilst this is factually correct, it is established in the next scene that the waitress is doing it on purpose.

At the valet parking, the customer is arguing about the attendant having lost his key. But the car is already parked in the street right at the valet station, so the key should most likely already be in the car.

Fizel tries to freak out Lindy by informing her that the delicious lobsters he's eating are basically the same as cockroaches, since they're in the same phylum. While this is true, any phylum is a very broad classification, and the Arthropods contain not just lobsters and cockroaches, but all sorts of segmented creatures - more than 80% of all animal species on the planet.

Fizel then remarks that Lindy is so unusual she must be in a different phylum from him; but people, monkeys, mammals, birds, reptiles, amphibians, and fish are all in yet another diverse phylum the Chordata - which also includes sea urchins/squirts/cucumbers, starfishes, and various worms.

After the opening title credit, in Lindy's imagination, the man arguing with the valet slams his car door. Lindy then slams it on his leg, without opening the door and after he already closed the door.

When Lindy's apartment has the explosion seen occurring from the street, all of the windows are blown out. But at the end of the film when Lindy visits the ruins, all of the windows are intact.

The film is set in New York. The shooting location is named as Bulgaria. Yet, British road signs and fire hydrant markings are visible throughout the film.

Laverne Cox's character consistently has a very incorrect pistol grip. She crosses her left the thumb over the back of her right, behind the pistol slide. Firing the pistol while holding it like this will injure that thumb. It's referred to as 'slide bite'. A trained cop would never hold a pistol like this.