The BlacklistGoofs
Factual errors
This show, like many from Hollywood that show a lot of gun use, routinely plays a sound effect of a gun being cocked whenever a gun is seen on screen. Often the gun shown either has no external hammer and cannot make the sound played or it has already been fired, negating the ability to cock it. This sound effect is used by sound editors that lack an understanding of how firearms operate.
Errors in geography
During various operations in Europe, cars are seen with the blue "EU" stripe along the left edge of license places even in countries that are not EU Member States.
Montenegro, as a former part of Yugoslavia, and a present day republic, has not had any associations with "royalty" since 1918 with the fall of the Habsburg Empire. There would not be any "Princess Sophia", let alone one politically acknowledged or receiving any extra attention or protection from the FBI.