Brandon Vietti Director Bruce Greenwood Batman, Bruce Wayne Voice Neil Patrick Harris Nightwing Voice Jensen Ackles Red Hood Voice Jason Isaacs Ra's al Ghul Voice Vincent Martella Robin, Jason Todd Voice John DiMaggio Joker Voice Wade Williams Joker Voice Bruce Timm The Riddler Actor, Producer Judd Winick Screenwriter, Writer Michael E. Uslan Producer Benjamin Melniker Producer Sam Register Producer Alan Burnett Producer