“Strike: Lethal White” is the fourth season of J.K. Rowling’s BBC One crime series “Strike“. Based on the novel of the same name, the four-part series will star Tom Burke and Holliday Grainger as Cormoran Strike and Robin Ellacott. “Lethal White” starts when a troubled young man comes to Strike’s office to ask for his help investigating a crime he thinks he witnessed as a child.