Directed by: Guillermo del Toro
Starring: John Hurt, Ron Perlman, Jeffrey Tambor, Selma Blair
Factual error: When Professor Broom puts the old pieces of paper together, the text translates to "Graveyard 16", not "Sebastian Plackba 16".
Factual error: During the subway fight, Hellboy rips a payphone off the wall, which sparks as he does so. A phone does not have a voltage source that would be high enough to spark.
Continuity mistake: Hellboy tosses Dr. Manning through the quickly-closing door to escape the pendulum on the bridge - he barely makes it under. Hellboy then spends thirty seconds dodging the pendulum, but when he dives for the door it's still closing at the same point and speed - just enough for him to pass. (01:30:55)
Trivia: The BPRD complex was (according to Del Toro) was originally FDR's secret emergency bunker. The library where Professor Broom dies was the president's office and Hellboy's room (with the big vault door) was his fallout shelter, just in case Germany perfected the A-bomb first.
Chosen answer: According to the comic books, his name is Anung Un Rama, or 'World Destroyer, The Great Beast.'