Well, that's bleak.
In the apocalypse, only the cockroaches and the British class system are guaranteed to survive.[…]
Compared to The Day After’s nominally “real” yet slightly corn-fed clichés[,] Threads’ characters feel like genuine people who’d just staggered straight out of the neighborhood pubs. You can tell, because you don’t really like them all that much.
[…]
Threads seemed to argue that [the] tapestry [of civilisation] was all just an illusion, its individual threads easily torn asunder by a sudden hot wind. Or even slowly picked apart, like the blankets being disassembled by Jane and her fellow neo-Neanderthals, by the gradual erosion of our empathy for each other.
— Sean O'Neal (AV Club)
Synopsis: Documentary style account of a nuclear holocaust and its effect on the working class city of Sheffield, England; and the eventual long run effects of nuclear war on civilization.