Issue: #274
Last valuation update: 2026-06-30
The Flash finds murderer, Clive Yorkin, undergoing the Nephron Process. Yorkin, clearly insane, keeps depressing the pain button, inflicting agonizing trauma to his brain. When the Flash attempts to remove Yorkin from the machine, Yorkin, in a rage, attacks the Flash. The Flash is taken aback by Yorkin's super-human strength, an apparent side effect of the Nephron Process. The Flash vibrates his m...
First appearances: Frank Curtis
Creators: Dick Giordano, Cary Bates, Ross Andru, Ben Oda, Gene D'Angelo, Frank Chiaramonte, Alex Saviuk
Characters: Barry Allen, Iris West Allen, Frank Curtis, Dr. Nephron, Melanie, Clive Yorkin, Chief Paulson