For the du person posting nuclear war films, I recommend Testament.

[greatauntoftriplets]

1. "Alas Babylon" scared the bejesus out of me when I was a kid.

https://en.wikipedia.org/wiki/Alas,_Babylon_(Playhouse_90)

Plot
A nuclear war is triggered when a young Navy pilot accidentally blows up a port in a foreign country during a time of heightened tensions, and the Soviet Union fires its missiles. The missiles destroy the American Midwest and most of the eastern United States.

The story follows residents of a small Florida town and how they react after learning of a massive nuclear attack that has killed 92% of the world's population.