Richard discovers new data on the global phenomenon. Catherine must take a risk to continue her research, but is she ready to do it? Meanwhile, a new revelation tests Martha's loyalty, and Zoe is forced to make an urgent sacrifice with the help of her newfound allies.
Casts:
Léa Drucker, Gabriel Byrne, Elizabeth McGovern, Natasha Little, Daisy Edgar-Jones, Stéphane Caillard, Guillaume Gouix, Molly Windsor