The Grand Moff has revealed to the New York Magazine that he cast fiery red head Karen Gillan because previous companions were just too nice:
“I just thought it would be, you know, bad girl in the TARDIS. “They’ve always been so well behaved, those girls!
I just thought, I haven’t met any girls like that. Most of the girls I know would just jump The Doctor as soon as they look at him. I said, ‘It’s time we have one of those’.”
But before the Daily Mail combusts with indignation Moffat has also clarified just how far he is will to take the Doctors sex life in future episodes:
“We know that he had a family once,” he said. “And we could pretend that he doesn’t have an eye for the pretty girl, but you’d be struggling to justify that view, wouldn’t you, looking at his choice of travel companions. I think he has at some point in his life indulged. Whether he still does is a secret between him and that big blue box.”
(via Digital Spy)