Deadly Doom Deviants Destress DoGooders

On both Earths One and Two, there was a Doctor Death who was an occasional adversary of the Batmen of twin worlds. Each used poisoned pollen extracts or super-allergens to blackmail their respective Gotham Cities. Each was quickly dispatched by the Caped Crusaders.

There was another Doctor Death on Earth-One, this man self-identifying as Doctor Drew. Whether this was his actual birth name or simply another alias is unknown. This man used his wealth to attempt to seduce pilot Larry Trainor into working for him, with the intent of exploiting Larry's new found superpowers as the radioactive Negative Man. On three separate occasions, Doctor Death hatched sinister schemes to ensnare Trainor with scientific snares like his specialized nerve gas, and exploit Larry’s negative energy body. Yet all three times, Death was rebuffed.

On Earth-Two, a similar man named Mister Ghool sought to blackmail wealthy individuals, using a chemical concoction of his own devising that seemingly turned his victims into clinically dead individuals he later revived to operate as his minions. Twice he was thwarted by the Dynamic Duo of Star-Spangled Kid and Stripesy.

Both Doctor Death and Mister Ghool who accomplished scientists, with the Doctor specializing in physics and the Mister specializing in chemistry. Each were motivated by greed and a lust for power, seeking to control humanity. Despite their various means, neither Death nor Ghool was a match for their frequent foes, each barely carrying on the lapsed legacies of the original Doctors Death!