Ok I see where you are coming from. :-)
"Panic" was an aftermath nuke war movie
and "Quiet Earth" was indeed very strange. :-)
However, "Countdown to Looking Glass" was fabulous. Check it out on IMDB and who was in it. (Hint, on of the actors was "the" Newt Gingrich himself :-))
(I have that one on DVD)
Another I really liked, however it was not really cold war was the movie "The Disappearance Of Flight 412".
World War III
It was a miniseries with a miniseries cast--Rock Hudson, David Soul, Brian Keith--about a Soviet task force that slips into a US northern Alaska outpost, and a small team fights it off. It was literally a "cold war" in miniature.
An enjoyably grim movie, it has one really gruesome real life footnote. The director, a real loudmouth, was getting out of a helicopter and yelled at someone, and turned and walked away in a huff...right into the rotor on the back of the helicopter, and was decapitated!
GRIMMEST Nuclear War Movie Ever:
Threads
NOT for the easily depressed!