The movie contains several factual errors, the most telling of which is the dramatization of Harry Houdini's death. In the film he almost drowns in the torture tank trick and dies on the stage in the arms of his wife. In real life he was punched in the stomach by a college student who had heard that Houdini could withstand any blow without harm. This did, indeed, rupture his appendix. He later collapsed on stage, was taken to the hospital and died there.
Although Houdini didn't die onstage at a Halloween performance, as this film would have you believe, he did, indeed, die on Halloween, 1926, several weeks after his last stage performance. To this day, in Houdini's memory, October 31st is celebrated as International Magic Day.