So... Boris. Are you evil?' [said the Doctor].'Not....

“ So... Boris. Are you evil?' [said the Doctor].'Not at all, my dear sir,' chuckled Boris.'You just chuckled,' groaned the Doctor. 'Chuckling's a dead givaway in my books. Along with putting your hands on your hips and snogging another man's wife. ”

James Goss

From : Doctor Who: Dead of Winter