Morris Katz, better known as Professor Katz, was long known as a brilliant scientist at Mars University, but was in 3010 revealed to be one of those dog-operated puppets that's been adapted for use by a cat. He was secretly controlled by the Thubanian leader until the big reveal. It is not certain if he has always been a puppet, or if, at some point, he was a human who, after his death, was used as a puppet.