"Timecrimes" is like a temporal chess game with nudity, voyeurism and violence, which makes it more boring than most chess games but less boring than a lot of movies. It begins by introducing us to an ordinary sort of Spanish guy named Hector (Karra Elejalde), who is sitting on his lawn of his country place using his binoculars and sees a babe stripping in the woods. Now this is important. What he is witnessing is the outset of an event he has already participated in, because of time travel. And when he goes to investigate, he runs the risk of running into himself, which, for paradoxical reasons, he already knows. Not this "he." The other "he."

I guess you can make up the rules of time travel as you go along, but whatever they are, they have to be inexorable, and there have to be dire consequences when a mere mortal rips the fabric of the space-time continuum. The reason we don't get more warnings of this danger, you understand, is that travelers into the past tend to do things which inalterably change the future, so that their present no longer exists for them to return to. I love this stuff.

Hector has a main squeeze named Clara (Candela Fernandez), but leaves her to go into the woods, and finds The Girl (Barbara Goenaga), who has been assaulted by -- don't get ahead of me here -- and then a little later he meets the Scientist (Nacho Vigalondo, the movie's director), who puts him into what turns out to be a time- travel machine, which had earlier, or maybe later -- now you're getting behind me -- done something to lead Hector to sit on the lawn, or maybe see himself sitting on the lawn, or maybe -- but now I'm ahead and behind -- and now (earlier, or later?) Hector wraps his bloody head (which I have explained in a review I still haven't written) so he will not be recognized by two of the three Hectors, although I am not sure whether this is Hector 1, 2 or 3.

I apologize for the 142-word sentence. In time travel, bad things can happen if you stop for very long. One of the crucial requirements is apparently not to meet yourself coming or going, although if you are physically present twice at the same time, what difference does it make if you see yourself, unless it drives you mad? If I were to see myself walk into this room right now, I would simply nod to myself and ask, "Have you finished writing that review yet?" If I replied "No," then I would say, "Well, I have, so why don't we eliminate the middle man and you kill yourself?"