Mad Rodney is a mad scientist appears in a episode "It's a Scary Scientist. He was voiced by a Tom Kenny. He talks to the Numbuh 4. He also meets Numbuh 3. He made a monster. He says "IT'S ALIVE! IT'S ALIVE!". His monster punched and slapped him with his face. His final words is "Ow! That Hurts! OWWWWWWWWW!" He faints and dies.
- He has a short black spiky hair, red eyes and wears goggles with red lens, white lab shirt, black gloves, pants, shoes and large teeth