That's very likely how I saw it (the PBS rerun).
It's definitely how I saw it. It made less of an immediate impact than The Day After, but more of it stuck with me, images of lone bicycling, the silences... I remember the mother/daughter conversation about what being with a man is like - not just the fact of it, but the dialogue itself, and what it meant that they were having it. It would be the closest the daughter got to that part of life, and they both knew it. That's having seen it only once, and that as a pretty young teenager.
Whatever was going on at the the time that lead to the production of both of these made 10-year-old me feel like a nuclear attack was not that far-fetched.
10-year-old you was not far off. It's easy to forget that living vibe. It came back to me when I caught a replay of the 1984 Presidential Debate on defense and foreign policy, not because of how Reagan presented, but how Mondale also spoke, so seriously, about this reality. There weren't so much sides on the issue of whether a nuclear conflict was a genuine possibility, rather on how to handle it. Seeing this again, for the first time as an adult, reminded me of how appropriate it was for that feeling to occasionally be palpable.
(It starts around 55 minutes in, the scary stuff)