Peaky Blinders boss Steven Knight has spoken out about Duke Shelby's ultimate fate. Peaky Blinders fans have been watching The Immortal Man after it dropped on Netflix following a major theatrical release. The harrowing film follows Tommy Shelby (played by Cillian Murphy) as he tries to outrun the ghosts of his past and right his previous wrongs. One of the biggest obstacles in his path to redemption was his son, Duke, who was heading on a slippery slope to a dangerous and violent life of crime.