The Organization's Castle

The main villain of the series. An 'angry' scientist (as opposed to a 'mad' one), Dr. Gangreen created the killer tomatoes with the goal of global domination. Along with his dull-witted assistant, Igor Smith, and army of tomatoes led by his head tomato, Zoltan, he is always trying to destroy San Zucchini and conquer the world. Dr. Gangreen, on occasion would be breaking the fourth wall with antics such as firing 'bullets' from his Tomatocoptor, but then making the comment "Dang! If this were prime time (television), I could have used real bullets", suggesting that Dr. Gangreen realizes he is part of a children's cartoon show (other characters also realize it at times) and the network censors are clearly not going to permit him to commit violent acts. Although being a genius, he miscalculated two "failures" that became large obstacles in his plans. Fuzzy Tomato (or F.T. as he is called) and Tara, who abandoned him to live with humans. Viewers learned much about Dr. Gangreen in the first season, from the fact that he was the first man to domesticate the wild turnip and ate an entire lawnmower at the age of six (as revealed in the episode "Give A Little Whistle") to playing in a high school rock band named "Mothra And The Handpuppets" (as revealed in the episode "Streets Of Ketchup"). In the episode "War of the Weirds" it was revealed that Gangreen's skin color and obsession with tomatoes came from his childhood rivalry with Sidney Igotcha, a rivalry that continued when Sidney became a scientist himself and used Killer Kumquats to try to take over San Zucchini. During the second season, Gangreen accomplished his goals of conquering Earth, only to be overthrown by Zoltan and imprisoned when it became apparent that conquering the world had an oddly calming effect on the scientist. He was busted out of jail by the Killer Tomato Taskforce and joined them in attempts to defeat Zoltan and the killer tomatoes once and for all. It was implied in "Stemming the Tide" that he was the cousin of Tomato Guy, though it was never revealed conclusively one way or the other. He is a homage to John Astin's Mortimer Gangreen in the movies.