In terms of the Doctor and the companion, we’ve done the fairytale version, we’ve done the romantic version… but this is the real-life version. What would it actually be like in real life if an intelligent, off-centre girl happened to meet a much older – to say the least – dangerous man, who whisked her away and took her to some terrible places? What would that turn you into? I don’t think that would necessarily improve you. It would improve you in some ways, but… she’s never going to comfortably fit back into the boring world.