Herbert Landon

Herbert Landon made frequent appearances in the Spider-Man:The Animated Series, debuting in "The Mutant Agenda". In the show he is a former colleague of the now X-Man Hank McCoy, taking over his former colleague's search for a cure for mutancy. He quickly forms an alliance with the criminal mastermind the Kingpin, promising him an army of engineered mutants for his various criminal uses, although he never intended to fulfill his end of the bargain.His true motives lay in not just curing mutants but their complete destruction. Following the capture of his former colleague Hank McCoy he intends to destroy his former friend as his first test subject, but interference from Hobgoblin, Spider-Man and Wolverine foils his plans and results in his fall into the mutant destroying formula.However this has the unexpected result of transforming monster that feeds on electricity and begins a rampage through out the city.However he was quickly stopped by Spider-Man and the X-Men, but was left with half his body remaining mutated with a green hue and claw like hand and foot. Following this, he went to work for the Kingpin and filled the scientific void left by Alistair Smythe. Herbert Landon despised mutants. Using the research notes of a formula that was developed by his former colleague Henry McCoy, Herbert and The Landon Foundation, using money provided by The Kingpin, began producing a chemical designed to kill all mutants.

Once The Hobgoblin discovered what he was doing, he began threatening Landon, forcing Landon to bribe him to keep his mouth shut. After a brawl ensued between Spider-Man, Hobgoblin and Wolverine, Landon was doused in the chemical, and was turned into a 30ft monster, before Spider-Man and The X-Men stopped him.

After being released from the hospital, Landon, now in a half human, half mutant form, began to work as the Kingpin's assistant, replacing Smythe, whom he had helped turn into a cyborg. Landon would help Fisk carry out his evil deeds.