That’s what makes him so terrifying, says Scott, in real life an affable 35-year-old from Dublin. “People that you’re really frightened of, it’s usually because you don’t know anything about them. You think, ‘God I’ve no idea what he may do’.” Slight, with dark hair and puppyish eyes, he doesn’t really look like an arch-villain. “You don’t need to have humps and fake noses and wigs and funny teeth,” says Scott. “What is really scary about Moriarty is that he can be right in front of you, hiding in plain sight. There’s an audacity about that.