Expansion This needs a stretch. (Feel free to remove when satisfied of completion.)
* Physical appearance; clothing.
* Personality.
* History.
For the character from The New Scooby-Doo Mysteries episode, Mission: Un-Doo-Able, see Mastermind (Mission: Un-Doo-Able).
Mastermind (Scooby-Doo! Night of 100 Frights)
Mastermind (Night of 100 Frights)
Vital Statistics
Gender Male
Hair color Black
Eye color Black
Other Statistics
Identity Holly Graham
Reason To sell her uncle's hologram machine in her name
Production Details
First appearance Scooby-Doo! Night of 100 Frights
Played by Tim Curry

The Mastermind was the disguise of Holly Graham.

Physical appearance

The Mastermind is a tall and very slender male, with black hair and a gray complexion.


He is Cruel, Evil, Heartless, and Dangerous. He wanted to make old monsters to scare the gang away.

Powers and abilities

  • Flight
  • Teleportation


Scooby-Doo! Night of 100 Frights

Alexander Graham unmasked

Prof. Graham set-up.

Holly Graham's costume

Holly Graham's the real Mastermind.

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