Nah, who cares who did it just kill everything let their gods sort through them.
But seriously I don't think anybody can really say what would happen if we were actually hit with nukes from a response perspective. Despite all the training, all the countermeasures, and discipline I think it very possible you would get immediate or rapid undirected launches. The mechanisms exist to bypass the security measures in case command authority was taken out preventing the proper launch cycles from being initiated and I can foresee them being used in the blind rage to simply hit anybody in response.
Far as the series I rather disliked it from the beginning just like I found Lost distasteful. Not my particular taste, lots of people seem to love it though and more power to them. I just wish I could find more shows I liked on TV, as it is I don't even remember the last time I watched much more than the news or the occasional movie.