In Episode Ten of The Crown Season Three, “Cri de Coeur,” the explosive marriage between Princess Margaret (played by Helena Bonham Carter) and Lord Snowdon (Ben Daniels) finally collapses in on itself. Both Snowdon and Margaret are having affairs, and after paparazzi photos of Margaret and her young lover Roddy Llewellyn (Harry Treadaway) leak to the press, proceedings for the first royal divorce since King Henry VIII's in 1540 begin. And in costume drama fashion, The Crown accurately depicts the massive scandal that was this royal affair, but there's much more to the story.