Dr. Harold Pablum is an antagonist of the TV series, Pablum is a scientist who serves as Otis Weaselgraft's sidekick minion. He is trying his best to help Otis, he is constantly abused by him. His favorite letter is C. He told the alphabet soup factory that his favorite letter was C, and there were many other hints throughout the show, such as him preferring a pet cat instead of a pet dog.