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

[British television series] Hammer House of Horror. I used to really enjoy these one-off stories where often there would be an incredibly cruel twist. A good example is the episode with Burgess Meredith and there's a nuclear war and he drops his glasses. To this day, you can show that to anyone and they'll go "Bwrrrrrrrr!" You know, sort of wander away shuddering.

I pitched Jay Hunt the opening scene (prime minister, middle of the night, he's woken up...). She paused, and then she laughed. She was very intrigued and all that, and then she said, "Does it have to be a pig?" So we went through various options: Could it be a supermarket frozen chicken? A giant wheel of cheese? A pig seemed just the right level of absurd, but then when he walks in and there's actually a pig there, it's awful.

[My parents when I was a kid] would go, "It's a nice hot day. Why are you inside watching the TV?" And you go, "Well, 'cause it's better?"

While I was thinking about that, the military, I read a book called On Killing, about the obstacles people have to pulling the trigger in combat. So sometimes you just absorb all this stuff without realizing you were doing research.

I would say the thing you can still see in Black Mirror is that I was probably traumatized by the specter of nuclear war. I was born in 1971, and in the '80s I came to understand that I was inevitably going to be frazzled to death in the nuclear apocalypse.

Online you're encouraged to perform one personality for everyone.