So Tobe Hooper (The Texas Chainsaw Massacre, Poltergeist) directs a script written by Dan O'Bannon (Alien, Return of the Living Dead) featuring a bunch of generic, no-name English blokes, Patrick Stewart and a wicked hot brunette with an unbelievable rack that walks around naked for most of the movie.
So some English astronauts team up with NASA to explore Haley's Comet when they discover a giant phallic shaped ship with an umbrella and decide it's a good idea to go explore. They find two naked dudes and the hot naked chick and are like, "Whoa, let's take them back to Earth and fuck them."
So at any rate, the naked alien dudes and the hot chick come back to Earth, but the crew dies. Except one badass Texan who flies to England to GET THEIR SHIT IN ORDER.
But it's too late - the naked chick has escaped and she is sucking the "lifeforce" (hence the title) out of folks left and right. They are powerless to stop her, because she is naked and English people have never seen breasts as magnificent as the pair on this sultry alien bitch.
But that's not all.
She turns people she sucks the lifeforce out of into some kind of zombie/vampire hybrids (walk and look like zombies, attack and feed like vampires) that threaten to destroy all of London! If our badass Texan who is in love, but also hates the alien vampire chick (they hatefuck in a hot, steamy wetdream) and an English colonel don't stop her and the other male carrier (fuck this guy, the movie loses track of him because his boobs are not succulent)... NATO will NUKE London (which is now in full out zombie/vampire holocaust chaos) in three hours! Three fucking hours!
Along the way, the Texan NASA cowboy guy with the interstellar hate crush makes out with Patrick Stewart in some steamy gay alien experience. Also, they discover that you can kill the alien carriers by stabbing them in the stomach with a big fucking knife.
In the end, again, I must tell you - this film features some immaculate tits. This chick has a great rack and is totally seductive. Also, there is a fair amount of violence and Brit on Brit man lifeforce sex, which is plus in any movie. And if ever wanted to see blood spew from Patrick Stewart's deflating skull - this is your chance! Totally worth the rental.
Also, the best part is (don't read if you don't want to spoil the end!)...
spoiler (click to show/hide)
Aliens kill most of the people in London and get away - fission mailed humans! Har!