It's time to get your taste for complicated things back. In the days of the Cold War - the simplest of conflicts, one half of the world against the other - artists like John Le Carré knew how to build vertiginous architectures on the simplest foundations. With Syriana, Stephen Gaghan, screenwriter and director, traces an inextricable labyrinth from a childish pattern: a handful of Texan billionaires and their acolytes are desperate to maintain their grip on planetary oil production.