Tommy sleeps with Diana Mitford to secure her influence with the Guinness Trust for his housing project. Diana later uses this to humiliate Lizzie during a tense dinner with Oswald Mosley and Jack Nelson, leading Lizzie to storm out. Episode Production Details:
Jack Nelson corners Billy, threatening him with a gruesome death unless he helps "serve up" Arthur to Nelson’s associates.
Michael Gray, still imprisoned in Boston, makes a chilling promise to a visiting priest: once released, he will kill Tommy Shelby.
Tommy introduces his newly discovered illegitimate son, Duke (Erasmus), to the family. While the family is shocked, Lizzie is particularly upset, feeling Tommy is trying to replace their late daughter, Ruby.