“I haven’t done [a Doctor Who] episode set on Earth yet, and I haven’t created a new monster. And there’s part of me that feels… I haven’t scared anybody yet… The Cybermen have a few little scary bits but it’s running at about a 5 of 6. I’d love to a 9. I’d love to do something that sends adults behind the sofa too and makes them wee. Pools of wee.”