Continuity mistake: In the beginning when one of the guards are dragging a prisoner, on of the guards looks in to the cell with the baby Lucian and the werewolf. At first when we see the guard look in through the bars, he face is totally dark. When it cuts from inside the cell, his face is suddenly lit up.
Continuity mistake: In the stand-off scene between Victor and Lucian, Victor jumps out the castle pillar window with his guards to the castle floor. Lucian is standing on the wall with the lycans. Victor and him look at each other, and in the first look, Victor has no helmet. Then he puts it on. Then they look at each other again and the helmet is off. Then they show Victor again with it on, fighting lycans with a sword.