Headmaster Mind ran a school for super criminals. He was a scientist who sent Matter Master, the Top and the Tatooed Man on a crime spree, caused the JLA to lose control of their powers and cause disasters when they tried to stop them, then had the U.N bring an injunction against the heroes forbidding them to use their abilities. The JLA members defeated Mind's hirelings without using their powers before overcoming Mind himself. Headmaster Mind later returned to seek revenge on the JLA with the aid of the Tatooed Man (again), and still later fought Wonder Woman and Wonder Girl.
- 5 Appearances of Headmaster Mind (Earth-One)
- 1 Images featuring Headmaster Mind (Earth-One)
- Quotations by or about Headmaster Mind (Earth-One)
- Character Gallery: Headmaster Mind (Earth-One)
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This character is or was primarily an enemy of the Justice League, in any of its various incarnations. This template will categorize articles that include it into the category "Justice League Villains."