La Danse: The Paris Opera Ballet (PG)

The veteran documentary-maker Wiseman observes the dancers and staff of the Paris Opera Ballet at work. The backstage scenes are fascinating and often beautiful.

Wiseman uses the length – two and a half hours – to create a rhythm, rather than the artificial, cramped narrative of a TV documentary. But his gaze is uncritical – the only really dark moment comes when the artistic director praises a twig of a ballerina for having lost weight.