When Police Chief Petrovich summons Alexei Kerkoska to his office, the camera scans low as it shoots from behind Petrovich toward Kerkoska. At one point, however, it pitches too low and reveals the rough walls of the sound stage behind the false walls of the inside of Petrovich's office.
The map used to plan the escape is a map of East Germany, around Leipzig, but the places and distances discussed do not correspond to those on the map.