In comedy writing, a sitcom plot is basically the same thing: What's the worst thing that could happen? But you're playing it for comic effect. It's a similar muscle being used with Black Mirror.

I can worry about anything.

That's not something that we've gone in thinking 'Right! How are we going to examine that now?' It's just when you take a step back you see that they're actually all sort of in that mode.

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

Seriously, if I switched on the TV and they were showing live footage of an army of fire-breathing pterodactyls machine-gunning people to death on the streets of London right outside my door, I'd be horrified, but not entirely surprised, nor any more scared than I already am. I'd probably just shrug and wait for them to smash the door down. We're so screwed, I don't even know what to worry about first.

Being slagged off is good for you. It thickens the skin and strengthens the backbone.

Your grades are not your destiny: they're just letters and numbers which rate how well you performed in one artificial arena, once.