Go right ahead, just smash that Drill Here button and help by expanding it, or I'll destroy the wiki with the Destruction Drill!Dr. Z is a major character in the Mr. Driller series. He's a kind and supportive man and helps Susumu and his friends and creates things. He created Holinger-Z. He has gray eyebrows, mustasch, hair and brown eyes. His rival is Dr. Manhole, who was once his friend and assistant.