This is absolutely cheating; I won't mention the movie much, the usual drooling raving comments I would put in would be scarecely better than the excellent comments already here. But I wanted to mention the music alone.
The theme music grabbed me so hard, I never quite got over it. This is so good that you are immediately expecting an epic before anything has even happened - and if you want to know, this incredible and moving tone poem is by a man called JOHN CHARLES.
He's a New Zealand composer, and he even has a website on sounz.org.nz, and you can see the music in score form, and wonder how anything in print can translate to something to tug so hard at the heartstrings of the soul.
The film? Very, very clever. But it explains very little in the end; something has gone fearfully wrong with the whole world, and Bruno Walters does his best with the intolerable consequences of something that we learn that in fact, he may have actually instigated in some way.
For a film that has almost no dialogue for the first part (well, strictly speaking, none at all), the thing is astonishingly dramatic; Gripping? I should say so..
And the ending explains nothing, obliterates everything, and introduces even more bewilderment. From what I have heard, it's one of the most highly rated ending of any film ever made in this category, and you have to be a bit brave to watch this, in a strange sense, because there really are no answers whatsoever, but hanging there does give you the most marvellous sense of strange and wondeful desolation. I seriously know nothing even remotely close to it.