Continuity mistake: Much of this movie was shot in Luxembourg, not in Paris. This is obvious on several occasions - the road signs are clearly not like the French standard. You even see a sign to »Trier (Trèves)«. In Paris, there would be no signs to this German town...and even if there was, these would say »Trèves«. The buses also have French registration plates but are from Luxembourg companies.
Plot hole: When Andy turns into a werewolf, he kills both Amy and Detective Benbou. Later in the morgue, Amy tells him because of this that she is forced to become his "rotting sidekick." If this is completely true, then Detective Benbou should also be following Andy around but he isn't seen after Andy manages to escape from the morgue.
Trivia: When this movie was released to DVD in Australia, the ending had Andy running to the hospital where Seraphine had just given birth to Andy's child. The baby opens its eyes and the eyes are yellow, indicating that the baby is a werewolf. Later DVD releases had the ending where Andy and Seraphine bungee jump off the Statue of Liberty.
Question: How did Claude kill Dr. Pigot? When Serafine is attempting to revive him, he doesn't seem to have a mark on him.
Question: At the beginning when the werewolves begin attacking people at Club de la Lune, what is the song being played as people run for the door and who plays it?