Overview
Doctor Death (Dr. Karl Hellfern) is a supervillain appearing in publications by DC Comics. The character was created by Gardner Fox and Bob Kane as an enemy of the superhero Batman, and first appeared in Detective Comics #29 (July 1939). He is notable as the first traditional supervillain to be encountered by the Batman, as well as his first recurring foe.
Fictional character biography
Golden Age
In his first appearance in Detective Comics #29, Doctor Death develops a lethal chemical agent from pollen extract and enacts a plan to use the poison to extort money from wealthy Gotham City citizens. He is assisted by a large East Indian manservant Jabah. He decides to eliminate Batman, and threatens to kill someone unless Batman stops him. Batman defeats his two henchmen, but is wounded when Jabah shoots him, though he escapes using a gas pellet. He then gets to Doctor Death's base, meeting him in his lab, and chases him around the building. To evade capture, Doctor Death ignites chemicals in his laboratory, presumably killing Jabah and himself in the resulting explosion.
Doctor Death next appears the following month in Detective Comics #30. With a new accomplice, a Cossack named Mikhail, Doctor Death is this time successful in claiming a victim in his extortion scheme, but discovers from the widow that the poisoned man lost his fortune in the Great Depression. Batman intervenes in the plot, following Mikhail back to Doctor Death's base, and upon apprehending the doctor, discovers that his face had been horribly disfigured from the lab explosion, resulting in a brown, skeletal appearance.
From Wikipedia (CC BY-SA 4.0).