If you want to try figuring out what's going on in this movie, maybe this will help... http://i.imgur.com/dFXQplF.jpg

Sci-fi has never been more down to earth, confusing and thereby realistic. Brilliant movie!

A wonderful science fiction film, about science, fictions, and definitely about ideas. The last twenty minutes is a particularly knotty exercise in duplication and duplicity, that any singular perspective can 'failsafe' backwards to snooker other perspectives into a kind of chaotic infinity, but the maddening, Russian Doll-esque complexity of the bigger picture is exactly the point the film's morality seeks to drive home. A perfect example of creating so much with so little, and refreshing in the way it gives the audience potentially more than they can handle. Recommended - and if you need things explaining afterwards, check the Wikipedia entry.