Batman: The Ultimate Evil the project, allowing Vachss to take some creative liberties. At a party, Bruce Wayne meets Debra Kane, a caseworker with Child Protective Services. He asks to join her while she visits clients. She agrees and shows him the varying degrees of child abuse she encounters in the course of her job. Wanting to understand the factors behind child abuse, Bruce, as Batman, breaks into Hellgate Prison and talks with an informant who points him to a child pornography and prostitution ring. Bruce's butler Alfred Pennyworth reveals that Bruce's mother, Martha Wayne, had been secretly investigating a similar child prostitution ring,
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