I don't understand the premise at all...
If there isn't any electricity, then why are their brains still working?
Why don't any of them have guns?

Probably won't watch it, and then look it up in 5 years to see if they answered my questions.
Unless it gets really good reviews.

I don't understand your brain question, but from what I understand, they do have guns, but before the electricity went out, their government had really strict laws about them, and almost nobody had guns there

Our brains use electricity to function

Oh? Do they? I did not that. Then I don't know the answer :/

You the verb in your second sentence.

Oops, my bad lol