Dr. Davis was a criminal scientist who attempted to use a bizarre vehicle he had created, piloted by an unwilling man named Fred Jenkins, to steal a rare statue. Jenkins betrayed Davis to Green Arrow, who captured the scientist. Shortly afterward though, free again somehow, Davis returned and attempted to gain revenge on Green Arrow with the aid of Mr Memory and his De-Memorizor ray. Mr. Memory was defeated by the Justice League of America and jailed; presumably, they caught up with Davis and with Mr. Memory's other allies later.
- This version of Doctor Davis (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.
- 3 Appearances of Doctor Davis (Earth-One)
- 1 Images featuring Doctor Davis (Earth-One)
- Quotations by or about Doctor Davis (Earth-One)
- Character Gallery: Doctor Davis (Earth-One)