Tenet star Kenneth Branagh has said Christopher Nolan showed up to his house uninvited with a copy of the script.The actor, who previously worked with Nolan on WWII epic Dunkirk, explained that the filmmaker has a penchant for unconventional casting techniques.Speaking on The One Show, Branagh explained, “In this case he rang up about six o’clock in the evening. He said, ‘Hello Ken, I have this project.