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.
Trivia: During the film Holmes and Watson are analyzing a pocket watch as a key piece of evidence. Their observations of the watch being scratched by a frequently drunken man's hand, and it being engraved by numerous local pawn shops is paraphrased from the classic Sherlock Holmes novel: The Sign of Four.
Trivia: When Holmes leaves the hospital after the slaughter house scene we cut to a street and the pub is called The Punchbowl. Director Guy Ritchie and Madonna co owned a pub in London called the The Punchbowl.