CLARA: Since when do you care about the Doctor?

MISSY: Since always. Since the Cloister Wars. Since the night he stole the moon and the President's wife. Since he was a little girl. One of those was a lie. Can you guess which one?

CLARA: He's not your friend. You keep trying to kill him.

MISSY: He keeps trying to kill me. It's sort of our texting. We've been at it for ages.

CLARA: Mmm. Must be love.

MISSY: Oh, don't be disgusting. We're Time Lords, not animals. Try, nano-brain, to rise above the reproductive frenzy of your noisy little food chain, and contemplate friendship. A friendship older than your civilisation, and infinitely more complex.