1917 is Sam Mendes' latest, a WW1 drama like no other, the story of two infantry men charged with a very dangerous mission: delivering a command to cancel an attack across enemy lines before thousands of men fall into a German trap. Oh, and it's all shot as if it's "one take". Yep. Speaking to Ali about how they pulled it off are Sam Mendes himself, co-writer Krysty Wilson-Cairns, and the stars Dean-Charles Chapman and George MacKay.