Directed by: Guy Ritchie
Starring: Robert Downey Jr., Jude Law, Rachel McAdams, Mark Strong, Eddie Marsan
Character mistake: In a shot that flashes by very briefly, a London newspaper's headline is shown: "Sherlock Holmes Aides Police." "Aides" should be "aids".
Character mistake: In the scene showing the outside of the hotel the British flag is flying upside down. The wider white band on the white X has to be top left next to the top of the flag pole. It is at the bottom, which is a universal distress sign.
Factual error: In the scene depicting life on Baker Street (after the "Sherlock Holmes" title), a horse-drawn carriage races through the streets of London. The only problem is, the carriage is driving on the right side of the road with others passing on the left. In England, carriages would be driving on the left. (00:07:05)
Dr. Watson: Get that out of my face
Sherlock Holmes: It's not in your face, it's in my hand.
Dr. Watson: Get what's in your hand out of my face.
Trivia: In the scene with the French Giant all of the French lines they speak were originally in English. Director Guy Ritchie found out that the man actually spoke French as his first language and decided on the spot to change it to add to the mystery of the film.