Expansion This needs a stretch. (Feel free to remove when satisfied of completion.)
* Physical appearance.
* Personality.
* History is incomplete.

For the main antagonist of Scooby-Doo! Night of 100 Frights, see Mastermind (Scooby-Doo! Night of 100 Frights).

Mastermind (Mission: Un-Doo-Able)
Mastermind (Mission Un-Doo-Able)
Vital Statistics
Species Human
Gender Male
Eye color Black
Other Statistics
Occupation Master villain
Production Details
First appearance TNSDMysteries: Mission: Un-Doo-Able
Played by Pat Fraley

Mastermind was a villain intent on world domination.

Physical appearance

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The New Scooby-Doo Mysteries

Cecil unmasked

Cecil unmasked.

It was the mission of the Un-Doo-able team to stop him. His real identity was Cecil, a tour guide.