Back at the very birth of cinema, a secretary named Alice Guy-Blanché saw the exciting new technology's storytelling potential. She set up her own studio, and over a career spanning 20 years, she wrote, directed or produced around 1000 films. Not only was she the first female director, but she may have been the first feature film director full stop.

So why don't we all know her name? And, digging further, why – and how – were other female filmmaking pioneers written out of history?

This fascinating documentary from Pamela B Green, produced and narrated by Jodie Foster, compellingly examines these still-relevant questions, and celebrates the incredible body of work of this prolific and forward-thinking filmmaker.