So. That’s it then. It’s taken just shy of 20 hours to work through the lot, a gestation spread across a decade. Every British actor in the firmament has visited the Leavesden set to chew on some of the computer-generated furniture. Several trillion techie hours have been racked up on achieving SFX which wouldn’t have been even a twinkle in a geek’s eye when JK Rowling first conceived the seven-part tale of a boy wizard. And a trio of young actors cast before puberty have missed out on a decade’s worth of regular schooling.

It is all in black and white, and undoubtedly very beautiful. Delphine Seyrig, the flighty, baffled siren at its heart, is undoubtedly very beautiful. The setting, which could be Versailles or a château in the Loire (it was in fact filmed at palaces in Bavaria), is undoubtedly very beautiful. The 1950s society mannequins, men in black tie, women in Coco Chanel, who're mysteriously occupying a central European spa hotel are undoubtedly very beautiful. It was undoubtedly directed, in 1961, by the then more or less unknown Alain Resnais and scripted by the better-known Alain Robbe-Grillet (author of Le Voyeur, 1955, and La Jalousie, 1957). Beauty agreed, it must be admitted that Last Year in Marienbad also remains as impenetrable on its rerelease as it was 50 years ago.

It is all in black and white, and undoubtedly very beautiful. Delphine Seyrig, the flighty, baffled siren at its heart, is undoubtedly very beautiful. The setting, which could be Versailles or a château in the Loire (it was in fact filmed at palaces in Bavaria), is undoubtedly very beautiful. The 1950s society mannequins, men in black tie, women in Coco Chanel, who're mysteriously occupying a central European spa hotel are undoubtedly very beautiful. It was undoubtedly directed, in 1961, by the then more or less unknown Alain Resnais and scripted by the better-known Alain Robbe-Grillet (author of Le Voyeur, 1955, and La Jalousie, 1957). Beauty agreed, it must be admitted that Last Year in Marienbad also remains as impenetrable on its rerelease as it was 50 years ago.

Jean-Luc Godard has lived in self-exile for most of his film-making life, a now 80-year-old enfant terrible. After the seismic ruptures to film grammar in his self-aware, playful Sixties work, he largely abandoned narrative and popularity at the start of the Seventies.

Great idea. Geeky Hasidic kid from Brooklyn's claustrophobic Jewish community finds his attention wandering during his rabbinical studies, and falls under the raffish spell of the older and wilder Yosef Zimmerman. He finds the slope is slippery indeed, and with head-spinning speed he's enmeshed in a transatlantic drug-mule racket. He's making big piles of wedge, but losing his immortal soul in the process.

At the end of last week it was reported that a Connecticut cinema, besieged with requests for refunds, had posted up a sign warning punters that The Tree of Life “does not follow a traditional, linear narrative approach to storytelling”. And so what? Terrence Malick’s Palme d’Or winner is certainly elliptical and impressionistic, but it’s also spellbinding, and as lofty and luminous as the stars in the sky. Above all, it’s a film which is buoyed – and which sometimes threatens to be sunk - by its own formidable ambition.

If you had a quid for every time a nerdy character in a contemporary comedy made reference to Star Wars, in particular to the gnomic wisdomous utterances of Yoda, you’d be richer. Maybe not as rich as George Lucas. But it happens. It happens a lot. A country short on mythology sources its gods and heroes in kiddie lit and stores them in the toy box. Over here we’ve got Homer.

Do you know where your teenagers are? If they're smart, they'll be somewhere watching Trust, the sophomore directorial effort from actor David Schwimmer that turns out to be as deftly compelling as it is unnerving.

The capture and arraignment of Ratko Mladic has brought atrocities committed in Bosnia back onto the front page. As Martin Bell used to argue, the Bosnian war struggled to hold the world’s attention even when it was going on. Two much more major conflicts, in which we have been doing the bombing rather than the peacekeeping, have since sent Bosnia plummeting down the squash ladder of important contemporary conflicts.

What is it with Hollywood and education? Hot on the heels (shamelessly come-hither pumps, in fact) of Cameron Diaz in the lamentable Bad Teacher, we now get Julia Roberts as a disaffected babe who, we're told, is a teacher even though she spends precious little time in actor-director Tom Hanks's new film doing anything of the sort. Still, at least Roberts's unquenchable radiance lends Larry Crowne some measure of class; otherwise, here's another movie that merits detention for failing to make more than a passing detour in the direction of real life.

Some directors are just grateful that their movies get funded and released, but Robert Redford has loftier aspirations. Scornful of the routine popcorn-spattered multiplex-filler, he thinks we should be prodded to improve our lot by learning the lessons of history, and says he wants to tell stories about "ordinary people that are affected by larger forces out of their control". This lofty blueprint has brought us Bob's latest behind-the-camera odyssey, The Conspirator.