Ethan Spaulding Director Jason O'Mara Bruce Wayne, Batman Voice Thomas Gibson Slade Wilson, Deathstroke` Voice Morena Baccarin Talia al Ghul Voice Giancarlo Esposito Ra's al Ghul Voice David McCallum Alfred Pennyworth Voice Xander Berkeley Kirk Langstrom Voice Sean Maher Nightwing Voice Bruce Thomas Commissioner James Gordon Voice Stuart Allan Damian Wayne, Robin Voice Joe R. Lansdale Screenwriter