It's a barrel of laughs, isn't it? It makes The Day After look like friggin'...insert name of cheerful thing here. It was one of the things that made me really worry about worst-case scenarios. There's something impish and probably somewhat therapeutic about thinking about those things.

I'm somewhat socially inept. Slide me between two strangers at any light-hearted jamboree and I'll either rock awkwardly and silently on my heels, or come out with a stone-cold conversation-killer like, "This room's quite rectangular, isn't it?" I glide through the social whirl with all the elegance of a dog in high heels

I'm known as being a massive dweeb who's into video games and so on.

I'll just immediately automatically, without even thinking, check my phone. And it feels like the same little bit of my brain is being - the synapses are lighting up when I do that.

Our four-year-old, like a lot of kids, you introduce him to an iPad and he quite quickly gets drawn in in a way that you're like, "Wow, I've got to stage an intervention here." He picked up on gaming terminology really quickly. If you say, "Keep practicing holding a pencil and see if you can draw a letter, the alphabet," he understands that if you do that you've unlocked Level Two.

The biggest teenage taboo is being strait-laced. It's easy to tell a researcher you went to a house party that turned into an orgy. It's less easy to say you like eating toast and watching QI.

You don't have the economy of scale of building a set once and casting once. You blow up the world, basically, at the end of each episode.