He is portrayed by David Wayne.
Batman 1960s TV Series
He was based on the Mad Hatter from the comics at the time, who had not yet been revealed to be an impostor. His main weapon was his trick top hat, in which concealed a set of eyes that would pop up and shoot a hypnotic beam at his enemy. In "The Thirteenth Hat"/"Batman Stands Pat", Tetch kidnapped the jurors who had previously incarcerated him, along with their hats. He was also after Batman's cowl, his "thirteenth hat." He had a female accomplice named Lisa, who worked at a hat boutique. She helped Tetch kidnap her boss, who was one of the jurors who had helped put him away, and aided in the rest of his scheme to foil Batman and Robin. In the end though, he was defeated and sent back to prison. In "The Contaminated Cowl"/"The Mad Hatter Runs Afoul," Tetch tried to get at Batman's cowl with the use of radiation. He sprayed the Dark Knight's cowl with radioactive material, assuming that he would take it off for fear of being contaminated. The radiation turned the cowl pink, but Batman (having previously taken an Anti-Radiation Bat-pill) did not remove it, and Tetch was again defeated. Jervis Tetch was one of the few main villains who was known by both his real name and his criminal name in the 1960s Batman series.
The Mad Hatter is played by David Wayne.