Mastermind (Earth-One)

Mastermind
Mainstream Universe‎, 1950s-1986
Gallery
Real Name	Unknown
Main Alias	Mastermind
Status
Alignment	Bad
Citizenship	American
Characteristics
Gender	Male
Hair	Black
Origin
Universe	Earth-One
Creators	Bob Brown
First Appearance	Challengers of the Unknown #32 (June, 1963)
Last Appearance	Challengers of the Unknown #32 (June, 1963)

Notes

• This version of Mastermind, including all history and corresponding appearances, was erased from existence following the collapse of the original Multiverse in the 1985–86 Crisis on Infinite Earths event and later restored following the rebirth of the infinite Multiverse during the Dark Crisis of 2022-2023. Even though other versions of the character may have appeared, this information does not apply to those versions.
• Enemy of the Challengers of the Unknown

Related

• Appearances of Mastermind (Earth-One)
• 1 Images featuring Mastermind (Earth-One)
• Quotations by or about Mastermind (Earth-One)
• Character Gallery: Mastermind (Earth-One)

Footnotes

Challengers of the Unknown Villain(s) This character, team or organization, is or was primarily an enemy of the Challengers of the Unknown. This template will categorize articles that include it into the category "Challengers of the Unknown Villains."