Ultraviolet was a British tv show that lasted 6 episodes and dealt with a potential takeover of the world by vampires, although they never use the word vampires. It stars Idris Elba (Stringer Bell from the Wire) and Jack Davenport (Coupling, Pirates of the Caribbean). Extremely well written series whose only flaw is that they didn't continue it. It looks like all 6 episodes are on youtube. It was released on dvd in the US in 2000. Here is a clip from the first episode.