Writing for adults often means just increasing the swearing - but find an alternative to swearing and you've probably got a better line.
Steven MoffatWe're thrilled to have Maisie Williams joining us on Doctor Who. It's not possible to say too much about who or what she's playing, but she is going to challenge the Doctor in very unexpected ways. This time he might just be out of his depth, and we know Maisie is going to give him exactly the right sort of hell.
Steven MoffatYou can be as beautiful and charming as you'd like, but if you're not terrific at acting, it will mean nothing on the screen.
Steven Moffat