The Mad Hatter (a.k.a.: Jervis Tetch) is a supervillain and enemy of the Batman in DC comic books, making his first appearance in October 1948 (Batman #49). The Hatter has gone through many changes in physical appearance over the years, but his basic look remains the same—short with large teeth, almost invariably wearing a large hat. While the Mad Hatter has no inherent superpowers, he is portrayed as a brilliant neurotechnician with considerable knowledge in how to dominate and control the human mind, either through hypnosis or direct technological means. In addition to comic books, the Mad Hatter has appeared as an enemy of Batman in the Batman television series, animated series, and various video games.