|"Come to steal an old man's medication, again?"|
|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.
In the season 4 episode Pomp and Circuitry it is revealed that Dr. Z lied to both Rusty and Jonny 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 my not be arching anyone)
 Episode Appearances
- Shadowman 9: In the Cradle of Destiny (speculated)
- The Buddy System
- Pomp and Circuitry (speculated; based on voice and silhouette)