The Thinker is a crime boss in Metropolis who has Jimmy Olsen kidnapped and replaced with a lookalike called Baby-Face in order to obtain information on Superman, Olsen's pal. The Thinker and Baby-Face are defeated by Superman, who rescues Olsen.
- This version of Thinker (Earth-One), 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 limited series. Even though versions of the character may have since appeared, this information does not apply to those versions.
- 1 Appearances of Thinker (Earth-One)
- 1 Images featuring Thinker (Earth-One)
- Quotations by or about Thinker (Earth-One)
- Character Gallery: Thinker (Earth-One)