David Giuntoli Batman / Bruce Wayne (voice) Patrick Fabian Harvey Dent / Two-Face (voice) John DiMaggio James Gordon (voice) Karan Brar Sanjay 'Jay' Tawde (voice) Navid Negahban Ra's al Ghul (voice) Darin De Paul Thomas Wayne (voice) Emily O'Brien Talia al Ghul / Martha Wayne (voice) Christopher Gorham Oliver Queen / Green Arrow (voice) David Dastmalchian Grendon (voice) Tim Russ Lucius Fox (voice) Matthew Waterson Jason Blood / Etrigan (voice) Jeffrey Combs Kirk Langstrom (voice) William Salyers Cobblepot / Professor Manfurd (voice) Gideon Adlon Oracle / Poison Ivy (voice) Tati Gabrielle Kai Li Cain (voice) Jason Marsden Dick Grayson / Young Bruce Wayne (voice)