Do you know how you make someone into a Dalek? Subtract Love, add Anger. - Steven Moffat

As we all know, it is the proper duty of every British subject to come to the aid of the TARDIS.

I'm not a psychopath, Anderson, I'm a high-functioning sociopath. Do your research.

What would be the point of having this job if I didn't get to make up some of the maddest possible scenes I've ever had in my head since I was a kid? For him to stand there and take the mickey out of all those monsters — is just hugely exciting.