Joan: Tell me. In this fairytale… who are you?
Martha: Just a friend. I'm not… I mean, you haven't got a rival, as much as I might… just his friend.
Joan: And human, I take it?
Martha: Human, don't worry and, more than that, I don't just follow him around. I'm training to be a doctor. Not an alien doctor, a proper doctor. A doctor of medicine.
Joan: Well, that certainly is nonsense. Women might train to be doctors but hardly a skivvy and hardly one of your colour.