I picked up this 1968 Hammer film a few years back when I read it was one of the inspirations for John Carpenter's Prince of Darkness. I think that's a terrific movie but I can't remember for sure because it scared me so bad I won't watch it again. Just the music frightens me. It's one of those I would have to watch on a very small screen in a well-lit room in the middle of the day. It's just so well-executed that it gives you nightmares because it has such indelible images that at some level you can't quite convince yourself it's not real.
Well, not this one. The first time I watched this we were on a trip and I had a hard time figuring out the ending on the small laptop screen. Turns out it wasn't the screen - it makes no more sense on a TV. But it is a neat little movie with a good idea behind it, although the alien creatures are so unbelievably bad it hurts. Not a bad movie - a good one for sci-fi buffs. It struck me as a really good idea that just ran out of money for an ending. Carpenter figured one out, which is one reason why his is markedly better (in addition to the updated production values).