What happens often is the script is written and once the director comes on board you have lots of conversations and it mutates again.

I'm trying to think overall. Some of our stories [Black Mirror], I think you're right in that they don't tend to have a message.

I think somebody's marketing a thing that Hoovers up your Twitter and it will continue tweeting for you after you're dead. I have no idea whether they saw "Be Right Back" or not.

In a weird way, when everyone's feeling that the world's going to hell in a hand basket, I kind of relax a little more because I often feel like that.

I think more and more people became aware that social media was starting to feel like a more toxic space. And, I mean - quite a lot of incidents of people getting very, very angry about all kinds of things and attacking people.

"National Anthem" was just a funny idea I'd been knocking about. I initially thought about a beloved celebrity having to do that - and then I watched an episode of 24. In my head, I was writing almost a parody of a 24-style president woken in the middle of the night with a crisis. It seemed more interesting to play it ultrastraight and to have the viewer's initial reaction be one of laughter and disbelief - and just have the whole thing become progressively more uncomfortable.

'Waldo' was one episode I always felt I didn't quite crack. And weirdly, now that feels like one of the more prescient ones.