Continuity mistake: In the first meeting room at the Russian Embassy, the picture behind Linda and Chad changes from a blue framed portrait of what looks like Yeltsin to a portrait of Putin.
Other mistake: The date on the surveillance footage from the camera in the Russian Embassy says 01.05.08, implying that it is either January or May (depending on which date notation is being used, American mm.dd.yy or Russian dd.mm.yy). However, it is fall/autumn outside, as there are dead leaves everywhere.
Continuity mistake: In the opening scene when Oz is brought in to be fired, he first approaches the desk and before he sits down, is standing in between the desk and the chair. In the reverse shots from behind him, he is standing behind the chair, not in front of it.
Factual error: The layout of the Cox's house doesn't make sense. The house is an end-terrace - stairs on the right side (from the front). The stairs rise to the back, and perform a 180 degree turn. The first door on the left is the Cox's bedroom. The wall opposite to the bedroom door would be a solid wall - the partition wall to the neighbouring terrace. Instead it has a well lit window.
Continuity mistake: After Chad Feldheimer and Linda Litzke leave the Russian embassy and pull up to Hardbodies where they work, there are no numbers above the door. Right after they enter, the interior shots show 1665 backwards above both sets of doors.
Continuity mistake: When George Clooney is running, there's a shot of him in the neighborhood with the back of his shirt drenched. When they show him inside the house shortly after, the sweat stain on his back is significantly smaller.
Factual error: The fitness center is supposed to be located around the D.C. area. Inside the fitness center, in one quick shot, at the top left part of the screen, out the big window, across the busy highway, you can see the sign of a camping supply store called Campmor. The one and only Campmor retail store is located on rt 17N in NJ, about 240 miles away from D.C.