Trivia: During a pan shot (I believe it's just before Quatermain's car pulls up at the League's headquarters) near the beginning of the film, a poster can be seen on one of the brick walls with several names on it. The names are those of the creators of the original comics series: Alan Moore, Kevin O'Neill, Ben Dimagmaliw and Bill Oakley.
Trivia: Nemo being an Indian (both in the original graphic novel and in the movie) was derived from the original version of Jule Verne's Mysterious Island. In 20,000 Leagues Under the Sea, however, Nemo was Polish, and in the course of re-publications over generations (and in previous movies), Nemo was turned into a European.
Trivia: Never in Robert Louis Stevenson's original short story was Mr Hyde larger than Dr Jekyll. He was considerably shorter and therefore Jekyll's clothes hung loosely from him. Also, Jekyll never needed a potion to become Hyde after the first time. The change became involuntary and ever more frequent. Hyde needed the potion to *change back* to Jekyll.
Trivia: Some of the film's complicated photography required Townsend to shoot a scene backwards. He said,"It's a very quick clip where I steal Jekyll's vial. Basically, they wanted to end the shot with the hand on the vial. And because they have to be so specific, it's such a fast speed shot and it just stops exactly, I couldn't do it normally. I had to walk into the room backwards and then go all the way back and pick up the vial backwards so that the camera could actually focus on that one. That was strange."