Bill injects Emily with the virus; she falls ill, forcing a dangerous mission for insulin.
It is revealed that the invaders are not from another galaxy but are the descendants of Emily and Sacha , who traveled back from a distant future to harvest healthy organs and fix their genetic defects. War of the Worlds - Season 2
Bill discovers the invaders look human; he considers using Emily to test his virus. Bill injects Emily with the virus; she falls
Resistance forms in London; Emily returns from the alien ship with strange visions. Resistance forms in London; Emily returns from the
Neuroscientist Bill Ward (Gabriel Byrne) develops a virus to target the invaders. He tests it on Emily Gresham (Daisy Edgar-Jones), discovering it is effective because she shares genetic material with them.
The season begins six months after the initial attack. The survivors in London have formed a resistance, while the "aliens" are revealed to be humanoid in appearance.