Directed by: Len Wiseman
Starring: Bill Nighy, Kate Beckinsale, Michael Sheen, Scott Speedman, Sophia Myles, Shane Brolly, Erwin Leder
Trivia: According to the DVD commentary, the entire budget for Underworld was the same as the highway chase scene in The Matrix Reloaded.
Trivia: The plot was supposedly loosely based on Shakespeare's "Romeo and Juliet."
Trivia: Kate Beckinsale plays a vampire and Michael Sheen plays a werewolf, both eternally warring in the film. Kate Beckinsale and Michael Sheen were formerly romantically involved, and in fact they have a daughter from their long-time romance.
Factual error: Every time the silver nitrate is shown on clothing, it is shown as silver. Silver nitrate in fact is black once exposed to light.
Selene: Whether you like it or not, you're in the middle of a war that has been raging for the better part of a thousand years. A blood feud between vampires and lycans. Werewolves.
Michael Corvin: Huh?
Selene: Consider yourself lucky. Most humans die within an hour after being bitten by a lycan or any immortal. The viruses we transmit are deadly.
Michael Corvin: So... if you bit me, what happens? I become a vampire instead?
Selene: No, you die.
Question: Can anyone explain Lucian's arm blade? It seems totally out of character for him, and every time he changed to wolf form he'd have to track it down and reattach it. Moreover, since these vampires don't have any weakness to metal, there's no special advantage in using a metal blade instead of his wolf claws. So what's the point?
Answer: Removal of the head kills everything. Immortal or not. At least that's what I saw.
Chosen answer: In most of the shots, Lucien takes his coat off when he changes to wolf form, and the blade would be attatched to a mechanism in him coat. Also, the film gives us an example of the blade hurting a vampire: bloodloss. And that kind of weapon could do some serious damage, and as it probably wouldn't kill the vampires, it would almost definitely slow them down.