Doc Terror is the main antagonist of the series. A brilliant, yet evil genius, Dr.Terror fused his body to a powerful computer system in a bizarre operation which he himself developed. Now programmed for the ultimate evil, he challenges the Centurions in a fight to rule to world!
During a flashback In the episode "Man or Machine (Part II)", he was a member of the Council of World Scientists, who was expelled because of his intentions of replace all humans with machines. Hacker, who was a runaway criminal, was the first experiment of turning a human into a robot. During an accident caused by Hacker, Doc Terror was seriously injured and he was saved by Hacker who turned him into a robot.
His Syntax unit can be attached to Hacker's Legion unit to create Uniborg.
- Ron Feinberg
- Juan Domingo Mendez (replaced by Eduardo Borja in some episodes) - Spanish dub.
- Doctor Terror - Spanish dub
- "Doctorcito" - Nickname given by Hacker in Spanish dub