Batman: The Enemy Within the game also present situations to the player where they may choose to approach as Bruce Wayne or as Batman. Crowd Play, a feature implemented in the predecessor, also returns for "The Enemy Within", allowing streamers to let their audience interact with their session with the game. The player once again assumes control of Bruce Wayne/Batman (Troy Baker), a billionaire who secretly fights crime in Gotham. His butler and former legal guardian Alfred Pennyworth (Enn Reitel), Police Commissioner James Gordon (Murphy Guyer), and Wayne Enterprises Chief of Technology Lucius Fox (Dave Fennoy) return to assist Batman in the field. The
Batman: The Animated Series as the Mad Hatter, David Warner as Ra's al Ghul, Michael York as Count Vertigo, Kate Mulgrew as Red Claw, George Murdock as and George Dzundza as the Ventriloquist. One of the series' best-known inventions is the Joker's assistant, Harley Quinn, who became so popular that DC Comics later added her to mainstream Batman comic book continuity. The Penguin underwent change for the series; his appearance was remodeled after the version seen in "Batman Returns", which was in production simultaneously with the series' first season. New life was also given to lesser-known characters for the series such as the Clock