Abilities: Like most mad geniuses, Harrow is astonishingly multi-talented. Not only an expert surgeon, he is a machine smith of no small talent, constructing a "mental pacemaker" to control his later creations, and a "response variator ray" to wreck havoc at the Daily Bugle by lifting everyone's inhibitions. After that, he vanished from the Marvel universe (with the exception of an abortive jail break in Amazing Spider-Man 219) until suddenly resurfacing just in time to become a prime suspect in the Hobgoblin Lives mini-series despite never being previously associated with any of the Goblins...
Favorite Quote: "After years of experimenting, Jonas Harrow has developed a device which will drive men mad!" (Amazing Spider-Man 206. I think the good doctor may have tried the ray on himself one too many times...)
Heroes He Keeps Running Into: Harrow couldn't get away from Spider-Man, even though originally he had no plans of confronting Spidey at all.
People Who Think He's Not So Bad: None of his criminal constructs were very fond of him, and there is no sign that there is anyone or anything more important in Harrow's life than his own staggering ego.
Most Despicable Act: Turning his experimental ray on the Daily Bugle to clinically observe the results. Although no one was hurt thanks to the presence of Peter Parker, the potential for mass destruction and mayhem was certainly there.
Amazing Spider-Man 114
Amazing Spider-Man 126
Amazing Spider-Man 168
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