Episode 4 (E04)

The Crown makes a devious move against James Delaney (Tom Hardy), while the Company has its own reasons for frustrating the plot. As London begins closing its doors to him, James sets out to protect his business by any means necessary. With empire and mayhem in mind, James adds depraved chemist Cholmondeley to his company with explosive consequences. Meanwhile, Lorna (Jessie Buckley) aims to prove she's anything but a weak link, while buried secrets become a matter of yet more intrigue and violence. (BBC)