Trivia: Towards the beginning of the movie when Emma Roberts and Hayden Panettiere are standing in the hallway next to their lockers at school, next to them is a bust of Henry Winkler's character who played the principal in the first film and was killed.
Trivia: The final chess match between Moriarty and Holmes is based loosely on a famous chess match between chess masters Bent Larsen and Tigran Petrosian. The match involved the sacrifice of a queen and a surprise checkmate, thus mirroring Holmes' apparent sacrifice of himself to stop Moriarty.
Trivia: Much of the ending was reshot, including a scene where the alien pilots within the spaceship were witnessed by Kate Lloyd dangling from some sort of tubes; the body of one was replaced post-production by an odd Tetris-like display.
Trivia: Throughout the movie if you look in the background at the various graffiti tags, one in particular stands out. Look for the tag OZ. In almost every scene that has graffiti on the walls you 'll see it somewhere in the background, sometimes more than once. Although it is common for graffiti artists to leave multiple marks in multiple areas, Berlin is a big city and it can be spotted too often for it to be coincidence.
Trivia: In the coffee shop scene at the beginning, the cashier/server who waits on Daniel Craig is the daughter of Michael Nyqvist, the actor who played Mikael Blomkvist in the Swedish version of this film.
Trivia: Shortly after Hugo drops a piece of metal from the suspending clock to the ground of the train station, the Station Inspector, assuming that Claude dropped it, loudly asks him if he is 'drunk, inebriated, shikker, etc.' The work shikker is from the Hebrew word shikkor for 'drunk'. Shikker actually means drunkard.
Trivia: "The City of Bridges" isn't Pittsburgh's only nickname. Other nicknames include "Iron City" and "Steel City" (referring to manufacturing prior to deindustrialization); "City of Champions", "Blitzburgh" and "Sixburgh" (pertaining to Super Bowls won by the Steelers); "Smoky City" and "Dirty 'Burgh" (self-explanatory); and the more derogatory "$h!tsburgh."
Trivia: Despite relatively high billing in the opening credits, Stana Katic only has about five minutes of screen time.
Trivia: Nine-one-one (written "911") is used exclusively for the emergency telephone number in the U.S. (Nine-eleven might be used more often in England.) In the case of "nine-eleven", a slash is used to show the separation of the numbers (9/11), which then dictates its pronunciation and distinguishes it (date of terrorist attacks) from the emergency 9-1-1 number.