Peter leads the Vectors in a desperate final attempt to spread the virus, while the CDC scientists work together and successfully create a cure just as their lives come under threat from Ilaria Corporation's deadly mercenaries.

Alan, Walker, Hatake and Daniel set a trap for an assassin who has been sent by Ilaria to retrieve both the virus and the cure.

In the Season 1 finale, Alan and Walker battle the Scythe to save the world from disaster.