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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.
- This version of Headmaster Mind (Earth-One), including all history and corresponding appearances, was initially erased from existence following the collapse of the original Multiverse in the 1985-86 Crisis on Infinite Earths limited series. However the ending of Convergence retroactively prevented that collapse, saving all the alternate realities, though in an "evolved" form. Even though versions of the character may have since appeared, this information does not apply to those versions.
- 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)
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."