|"That child is a spinning-murder-top! Are you sure he is your son?"|
|1st appearance:||The Buddy System|
|Voice Artist:||Chris McCulloch|
Dr. Z then asks Rusty if he can shoot at him from his helicopter or throw scorpions at him. When Sgt. Hatred shows up for his appointed arching date, he sees Dr. Z and tells one of his Malice Troops to take out the surveillance equipment so he may take a picture with Dr. Z.
In the season 4 episode Self-Medication Dr. Z reveals he has long since retired from super-villainy and settled down with Mrs. Z. His only regret was not being able to have children. A problem promptly fixed by his adoption of Ro-Boy. It is also worth nothing that Dr. Z may be homosexual, due to a comment his wife made during Self-Medication about her being his "beard." A common slang word referring to a woman who marries a gay man to keep up appearances.
In the season 4 episode Pomp and Circuitry it is revealed that Dr. Z lied to both Rusty and Johnny during the episode Self-Medication about his 'retirement' from the life, since it becomes clear (through both his voice and his silhouette) that he is a member of the Council of Thirteen of The Guild of Calamitous Intent. (though he personally may not be arching anyone)
- Shadowman 9: In the Cradle of Destiny (silhouette and voice)
- The Buddy System
- Pomp and Circuitry (silhouette and voice )
- What Color is Your Cleansuit?
- Bot Seeks Bot
- All This and Gargantua-2
- Hostile Makeover