A disgraced surgeon, he began his unconventional surgery to give powers to amongst others Hammerhead[1] and Kangaroo.[1] After these failures he implanted a device in the brain of Will O' The Wisp in order to force him to participate in his master plan, which wasn't further explained.[2]

Later on he used another device to control the Daily Bugle workers' minds, specially J. Jonah Jameson, but Spider-Man thwarted Harrow's plan again and he was sent to Ryker's Island jail.[3]

Jonas Harrow was hired by the Hood to take advantage of the split in the superhero community caused by the Superhuman Registration Act. He helped invent a power drainer based on a prototype made by Iron Man. When the Hood lost his powers after being defeated by the New Avengers, Harrow attempted to use the power drainer as a bargaining chip to replace the Hood among Norman Osborn's Cabal. Osborn called Harrow in to operate on Luke Cage, and secretly planted a miniature bomb on Cage's heart. However, the Hood soon returned, with new powers granted by the Norse Norn Stones, and blew Harrow's head off with a single magically charged bullet.[4]


Scientific genius. Expert in genetics, cybernetics, mechanics, and surgery.


Variator Beam (insanity inducing weapon).

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