Simon was a minor villain appearing in the New Adventures of Jonny Quest episode Peril of the Reptilian. He was voiced by Barry Dennan.
Simon was Dr. Phorbus' assistant. When the Quests arrived on Phorbus' island, Simon and Patch were sent to "welcome" Dr. Quest and Race Bannon. They brought them back to Phorbus' compound. Afterward, Simon and Patch took Race out at gunpoint and left him to be eaten by the tyrannosaur hybrid, which subsequently attacked the compound after Race, who had escaped thanks to Jonny Quest and Hadji Singh, sabotaged the forcefield generator. Simon, along with Patch and Phorbus, was buried when the ceiling of the main lab caved in on them.