On their first approach to the cabin in the woods, the snowmobiles of the assassins are white. In later scenes they are black.
She asks the FBI agent what the girls name is but in the pictures she has of the girl there is obviously a picture of the girl wearing a hat with her name on it. It's displayed twice throughout the movie, both before and after she asks.
When Cruise is stabbed in the back, the knife changes positions three different times, starting in the middle, between his shoulderblades, then again just inside his right shoulderblade, and then a third time closer to his shoulder.
Storyline description states Lopez was US Army. However, during 'training scenes' with Adrian, Lopez is wearing MARPAT (US Marine Corps pattern) camouflage.
J Lo said Joseph Fiennes' character, "Lovell" , was S.A.S training the unit she was serving with. If that was true, why was he wearing a Parachute Regiment beret? Did they not have a military advisor on set either? I'm ex UK military and that is NOT how you wear a beret! He looked more like Frank Spencer.
Wolf pups would not be so friendly with a human unless they were raised around a person. Even young wolves would be wary of humans, and would run away, rather than happily playing with one.
When the Mother tells Cruise to kill the power (electricity supply), he is seen cutting lots of thin, coloured cables that are clearly for carrying electronic signals, not electrical power. Moreover, if that was really the main power box, he would only need to flip the circuit breakers (or pull the fuses). If he wanted an irreversible solution, he would only need to cut a single cable, the main supply into the box.
The color of the beret was not necessarily wrong. Lovell was described as "Ex SAS". He was wearing a captain's pips so as an officer wouldn't be permanent SAS. Ex SAS, returned to Parachute Regiment. Also, he was in Afghanistan: in war zones it is not unknown for SAS soldiers not to wear the beret as it marks them out as a target. The beret was shaped and worn all wrong though.
When Cruise is telling the Mother about an arms stash in Nuevo Laredo, he says that there were typical stuff, MK-12s, bump stocks, silencers. Bump stocks aren't weapons or even considered contraband to anyone other than the USBATFE, and wouldn't have been worth mentioning alongside Russian machine guns in a weapons cache in Mexico.
Twelve years have passed and yet The Mother has not aged a minute.
After their car is rammed, Zoe has blood on her forehead and is bleeding from her nose, even although she was (surprisingly) not thrown from her seat.. Cruise has bleeding injuries all over his face and neck but he was still in his seat after the accident (restrained by his seat belt), although the car was rammed on the passenger side, so he should have been relatively unharmed. His injuries are not consistent with the types of abrasions caused by an inflated air bag.
Before the car was rammed, Zoe was lying, resting on the back seat, with no seat belt on. Afterwards, she is lying in the same position, looking quiet and calm. She should have been thrown from the seat and looking terrified or anxious.
After the first snow-cat hits a mine and explodes, Adrian scans the trees (from at least half a mile away) and, within a second, sees (with the aid of the improbable magnification of his Hollywood binoculars) one of the mines, well hidden in the forest.
In a scene that takes place in Illinois, a vehicle driving over a bridge passes a sign saying 80KM/H speed limit, which means the scene was filmed in Canada.
Towards the beginning of the film when Jennifer Lopez's character arrives in Ohio, the side of the jet says 'North', and its tail is blue with a yellow sun with a polar bear; this is clearly a Canadian North jet. However, Canadian North only flies in northern Canada, mainly in Nunavut; there's actually a Nunavut flag visible on the side of the plane towards the cockpit (yellow and white with a red inukshuk in the middle).
Mother and Zoe manage to get from Connecticut to Alaska in an old truck. They would have had to cross the border twice (USA to Canada, then Canada to Alaska), without documentation. It's conceivable that Mother might have found ways to get there, but not with the same old, traceable truck.
Nowadays, a physician would never be in an office with a minor without the guardian's presence.
"Butterfly stitches" will not secure a deep wound on the shoulder as there is too much pressure: the character should have either pressure-packed the opening, stitch with glue, or better if available, suture with a few wide and strong stitches.
Small animal bites are not sutured (or very loosely) so as to decrease the risk of infection.
The physician did not prescribe antibiotics and did not ask the guardian for permission to administer rabies and tetanus vaccinations.
No way the Adrian character would have left the scene without verifying the kill.