One Day in September is a documentary of consuming importance. When it was released in 1999 it won an Oscar, causing controversy, among those like Edward Said, on the grounds that it did not adequately depict the motivation of Palestinian terrorists.

But one can also argue the contrary - that its hour-by-hour account of the kidnapping of Israeli athletes during the 1972 Munich Olympics does constitute the fullest historical record of what has become the dominant horror of our times.

Kevin Macdonald (Touching the Void) also did something relatively new in the history of documentaries: he showed that it was possible, by the adroit use of archive and talking heads - including the only surviving terrorist - to construct a passionately involving narrative, so that the viewer was even more gripped than he or she might have been were they watching a feature film.