Professor Greer

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Professor Greer
Professor Greer
Vital Statistics
Species Human
Gender Male
Hair color Gray
Eye color Black
Other Statistics
Occupation Scientist (incarcerated)
Production Details
First appearance TSDS: The Creepy Creature of Vulture's Claw
Played by Frank Welker

Professor Greer was a friend of Velma Dinkley.

Physical appearance

Greer is an elderly Caucasian male with gray hair, and wears glasses.


As his normal self, he is friendly and intelligent; but as the mantis he is very unwelcoming and slightly evil.


The Scooby-Doo Show

Season three

Professor Greer unmasked

Prof. Greer unmasked.

He secretly dressed up as the praying mantis creature as he wished to scare competion away until his purchase of the gardens was finalized; because he had discovered oil on the property.



  • He is probably allergic to flowers as he sneezed from them when he was the Mantis.
  • He must be very fast, as he appeared as the mantis in the hallway seconds after exiting in his normal attire.
  • His height changes throughout the episode (from about 5 feet to about 7 feet).

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