One of the spooky films of my childhood, I really liked the dream-like qualities of the film. Imagine my surprise to find that the movie is in color. When I was a kid, we only had a black and white TV.
The movie hits us with that common fear that we may not recognize or know our enemy. In that era, the enemy were the Reds --- today the enemy would be terrorists. Enjoy the trailer and the movie, I think that the film holds up pretty well for it's age.