TV Series | TV-14 | | Action, Drama, Sci-Fi
The crew of a naval destroyer is forced to confront the reality of a new existence when a pandemic kills off most of the earth's population.
Coincidently, the actor that originally was cast as Lt. Kara Foster became pregnant, and due to the pregnancy she was recast.
There is a missing explanation on the need for the primordial strain. Like most mutations, they were random and various, resulting is possibly 1000's or even millions of different variants. By some chance (or perhaps by design) this process halted. Their only hope was to return to the original strain for a cure/vaccine and hope that it would be able to work with all of the mutations.