In the parking lot fight with the biker gang, the man who had Dixon pinned to the truck trying to stab her with a Spyderco knife. The knife begins with the blade edge positioned on the top and in the last frame the knife switches to blade on the bottom. (right before Dixon stabs him in the eye with a high heel).
When Neagley is checking out Jane's video games stacked on the table, on closeup she rotates the cases so all the spines are aligned and easily readable. When Dixon comes in and it switches to a wider shot, the games are all misaligned again.
When O'Donnell is describing the legislative director he wants to compromise, he claims that the director graduated from the University of Virginia law school with a 2.3 GPA. However, the UVA School of Law requires a minimum 2.7 GPA to remain in good standing (i.e., not be expelled).
When A.M kills the plastic surgeon, he tells the surgeon that as a doctor he knows what has happened; that he has a severed trachea. A.M stabbed the surgeon on the right side of his neck at the jugular arch. Not only is the jugular a vein, not a cartilaginous tube, but it was punctured, not severed.
When Reacher and Finlay are talking on the street after the Boston symphony, behind them is a restaurant "My Roti Place." However, this restaurant is part of a large chain of restaurants in Toronto (which the series is filmed).