Get the latest entertainment news, reviews and star-studded interviews with our Independent Culture email Get the latest entertainment news with our free Culture newsletter Get the latest entertainment news with our free Culture newsletter There is something about my face that makes people want to see me cry,” says 36-year-old Malachi Kirby, who has made a career out of brooding and breaking down in shows like Black Mirror, Roots and Small Axe. Looking at him now, his robust cheekbones and robust-er jaw, I wonder why that might be. Probably there’s something about seeing immovable strength undone by a stroke of sadness – like watching a trickle carve itself into the side of a mountain and become a raging river. “It’d be nice to actually have fun on set for once,” Kirby laughs, giving a quick flash of pearly teeth. We’re speaking in a suite in an upscale London hotel; he’s on the sofa, grazing on a bowl of nuts. For now, fun will have to wait. Kirby’s role opposite Stephen Graham in A Thousand Blows …