"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.

In summary, our world is doomed.

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

People gravitate towards their own era, nostalgia therapy is a real thing that's being tinkered with.

If technology is a drug – and it does feel like a drug – then what, precisely, are the side-effects?

We've got characters in the UK like Boris Johnson, who's kind of like a proto Trump in many ways even down to the crazy blonde hair. Then Mayor of London, now Foreign Secretary, Boris Johnson was widely seen as a cartoonish oaf and that made him strangely undentable as a politician. No one could land a blow on him because he was already ridiculous.

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