Being Human sounds ridiculous on the surface: A vampire, a werewolf and a ghost share an apartment (sorry, flat) in Bristol; Mitchell (the smooth vamp) and George (the nerdy Lycan) work dreary jobs at a local hospital, while Annie (the spook) hangs out all day at the home in which she mysteriously died, not moving onto the Other Side for as-yet-unknown reasons. There's plenty of humor, but even more existential angst and just enough supernatural action to balance out the bipolar laughs-to-darkness swings. In short, Being Human is a damned engaging show with instantly identifiable characters and a dose of subliminal social commentary. Oh, and the Brit-pop soundtrack kills.
In the season finale, Mitchell is at death's door after an attack by the vampire uprising (there's always a vampire uprising), Annie is out for revenge on all fronts, and George may just bolt for a "normal" life. Since Being Human is currently filming a second season for 2010, don't count on any of these developments as holding any finality. Or do.
Either way, I'd advise catching up on the series by any means necessary (on-demand, online, whatever); here's a brief recap: