Director Tobe Hooper's Lifeforce, the follow-up to his most popular hit Poltergeist, is a film that must be seen to be believed. That's not really a compliment, though, since Lifeforce isn't much of a movie when all the sound and fury is over. But you've got to admit there's something crazily admirable about a picture that starts out as a science fiction mission to Halley's comet, turns into an alien-invasion thriller featuring a beautiful naked woman (Mathilda May) who's a vampire from space and escalates into an end-of-the-world disaster flick.

Armed with a big budget and a special effects crew led by Star Wars pioneer John Dykstra, Hooper and Alien cowriter Dan O'Bannon have whipped up a concoction that's got everything anyone could ask of a horror movie--from zombies running amok in London to rotting corpses and energy bolts that signal the apocalypse to come. Keeping it all together is Steve Railsback as the Halley-mission survivor who holds the key to mankind's salvation--but what fun is saving the world when you could be seduced by a sexy naked space vampire? Check out Lifeforce to see how it all turns out. --Jeff Shannon