I am neurotic, and I'm a worrier.

I'm a worrier. In the UK, if I'm known for anything, it's sort of for being cynical.

Don't accuse anyone with the temerity to question your sad supernatural fantasies of having a 'closed mind' or being 'blind to possibilities'. A closed mind asks no questions, unthinkingly accepting that which it wants to believe. The blindness is all yours.

I was more aware initially of shows like Tales of the Unexpected. And the BBC used to put on a lot of one-off, bizarre television plays.

"Be Right Back," in which Hayley Atwell brings Domhnall Gleeson back from the dead using his social-media profile, sprang out of an unrelated conversation. Other stories you thrash away at for weeks and weeks.

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.

I kept saying I want to do an episode that's set in the past, how do we do a period episode of Black Mirror? And simultaneously there was another idea we were thinking about and the two things sort of gelled and became San Junipero.