The post-apocalyptic drama reaches its thrilling conclusion as the fates of the Family, the Lab and the rest of the world come crashing together in a deadly showdown.
Discover 11,128,835 listings and 280,062 playable programmes from the BBC
The post-apocalyptic drama reaches its thrilling conclusion as the fates of the Family, the Lab and the rest of the world come crashing together in a deadly showdown.