Richard: (on his Spooks character, Lucas): He used to work for MI5. He was a predecessor of Tom Quinn and was Harry's protégé, the best in his field. He went to Russia and got caught and banged up for eight years. He's tortured, interrogated and broken and then he mysteriously finds his way back. It's cultivated by MI5 to get him back and no one knows why. He comes back with dirt on his feet from Russia and spreads it around a bit. They're suspicious that he's a double agent so that [plotline] goes through the series.