Lewis Sezon 6 Odcinek 4: The Indelible Stain

When controversial American academic, Paul Yelland, is invited to speak at Oxford's Department of Criminology, it stirs up a lot of deep-seated emotions. And when he is found strangled in his room later that night, Lewis and Hathaway have several suspects who fall into the frame - was his murder motivated by politics, ambition, or vengeance?