When the film was released, director Mathieu Kassovitz called it a "bad episode of 24 (2001)." In an interview with amctv.com, Kassovitz said that 20th Century Fox interfered throughout production, and he never had a chance to shoot a scene the way it was scripted, or the way he wanted it to be.
According to Mathieu Kassovitz, Vin Diesel was astounded at how much the film had been shortened. Having just completed production of Fast & Furious (2009), he had not seen a cut of the film in six months. He joked, "Am I even in the movie any more, or am I on the cutting room floor?"
The aircraft on which Toorop, Sister Rebeka, and Aurora are flying to New York, is a Boeing-787 "Dreamliner". This is the first appearance of this airplane in a movie. However, the interior shot shows them sitting on seats, most likely belonging to the cabin equipment of a Boeing-737.
Mathieu Kassovitz originally intended the film to be highly ambitious. However, 20th Century Fox interfered with production all the way through, preventing Kassovitz from shooting scenes as he intended, sometimes even going against the script.
The Cyrillic tattoo on Vin Diesel's left hand reads "SLON" ("Elephant") which stands for "Solovetsky Lager' Osobogo Naznacheniya" (Solovki Special Purpose Camp), one of the earliest GULAG's encampments (1923-1933). Later, this tattoo was popular among criminals, with a new interpretation: "Smert' Legavym Ot Nozha!" (Death for Cops From a Knife!).
The movie features the future 1 World Trade Center and 2 World Trade Center, which were not yet built when the movie was filmed. The 2 WTC in the movie is the 2007-spec proposal, which was later replaced by the 2015-spec one.
The trivia item below may give away important plot points.
Oakley products were used throughout the film. Vin Diesel uses an Oakley Icon Backpack 2.0 and Factory Pilot gloves, and an assortment of Snow Frame goggles in the snow bike chase are on all the actors. Although they never made it on the final cut, there is a still photo of Diesel, on the DVD case, wearing Oakley O-ROKR mp3 glasses, slightly modified, after he is fixed by the doctor, who brought him back to life.