
Summary: Come in Peace," says the alien visitor. "You Go in Pieces," replies the no-nonsense cop. And he's right, of course. The alien sees human beings as convenient drug factories for his kind and if his mission succeeds they will take over the Earth and turn us into walking crackhouses.
Note: Since a some in this forum thought that the movie was excellent. Here is another presentation. I haven't seen it myself so I will try to catch it.