Yesterday, the evil Miss Hartigan was interviewed on Paul O'Grady's chat show. If you didn't already know, behind the female villian that will star in this year's Christmas special, The Next Doctor, is an actress known as Dervla Kirwan. The video of it is now on Youtube for you all to watch, and has an extra-special, brand spanking new clip from The Next Doctor. On top of that, Derval does her M&S voice! Exciting? Then watch it below!