Wow you have just completely ruined Madam Secretary for me, good job buddy

I watched this in the UK, it has 10 episodes and is left open for a potential 2nd season but it hasn't been confirmed yet

Well it sounds like they've been in this Other community since pretty near the start, not too much of a stretch to assume they have electricity since the Alexandrian's do

As in Daryl Dixon

well said by someone who truly has no understanding of post-production!

Black Mirror isn't a BBC show so don't panic too much