SM: Andrew Scott became a star - which he absolutely deserves to be - on the basis of being in the last three or four minutes of Sherlock. His screen-time was tiny but it’s a measure of that man’s extraordinary talent that he’s become such a big deal so quickly. He’s a genius.

MG: What Andrew does astonishingly in this series is the suggestion of bone-deep weariness with existence. There’s a sort of black— those black eyes— which you can’t quite fathom. It’s really quite chilling. It’s almost like there’s something else inside him looking out.