Greg Walker shared some thoughts on two major additions to the cast via EW.: On Why Vincent Kartheiser's Dr. Jonathan Crane aka Scarecrow Makes for the Perfect Season 3 Threat: "Think Hannibal Lecter. He's been given the opportunity to opine on ways to stop villains, and a villain breaks out in Gotham and it draws [Dick Grayson] to work with him," Walker explained. "So much of our show is about becoming a family and the fears that people have as they grow older and get older. Crane seems to be, in many ways, a perfect villain in that he exploits fear. The human mind and heart become the battlefield. This is someone who's working off your feelings, and your emotions, and that's where we want to live. This is a learned psychologist who understands the human mind but also has a deep, dark vendetta to destroy people in a way that you need to be able to manifest as an actor – to find the broken and the mania. And [Kartheiser] handles both very well."