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Marcus is a secret evil spy shown at the end of multiple episodes of "Who is Marcus?". His evil plan is to destroy television, so he is everyone's arch enemy. His hideout is located in Antarctica and has 9,000,000,000 HP (Health Points). Only the Incredible Crew can destroy Marcus.

Marcus was on his own from the start and his success eventually necessitated that he secure a steady flow of product for his evil theaters. In 1984, he founded the 
Villian's Vaudeville Company, a theatre chain which showcased one-reeler films as well as live variety shows. In 1990, the company had considerably expanded and got the name Marcus's Condensated Enterprises. Warning: He might destroy television!