Stars: Gabriel Byrne, Léa Drucker, Natasha Little, Daisy Edgar-Jones, Ty Tennant
Series Plot: When astronomers detect a transmission from another galaxy, it is definitive proof of intelligent extra-terrestrial life. The world's population waits for further contact with bated breath. They do not have to wait long. Within days, mankind is all but wiped out by a devastating attack pockets of humanity are left in an eerily deserted world. As aliens hunt and kill those left alive, the survivors ask a burning question - who are these attackers and why are they hell-bent on our destruction?
Episode plot: London, four months after the attack. The survivors organize the Resistance. Bill continues his research on aliens and understands that their DNA is human but that their organs are degenerating. In France, a severely wounded dissident alien reaches the Observatory