Professor Venomous is a character of OK K.O.! Let's Be Heroes cartoon. He made his debut in the episode called We're Captured. Professor Venomous is an expert in bioengineering who uses potions and nonfatal gases. He is typically calm and indifferent in communicating but has the feeling of a thrill-seeker. OK K.O.! Let's Be Heroes Professor Venomous with his Potion cursor.