The group find the military facility known as 'Ark' and life and death both take their toll.
The group find a father and daughter in a secluded village but all is not what it seems.
Jandra is injured in an accident; Leo runs away; Hild discovers an abandoned hospital.
The magnitude of the disaster becomes clear to the survivors as they seek safe food.
The group heads into a devastated Sheffield and meets a terrifying enemy.
A railway carriage is frozen, protecting its occupants from a global disaster.