P.T. Geist

P.T. Geist is an alias for a villain whose true identity is unknown. He researches his victims and uses death-traps appropriate to their personalities. For example, he put Scooby-Doo and Shaggy Rogers in a pit that was being filled up with pastries. He made Daphne Blake solve a maze to rescue the others.

Appearances

 * "Danger-Prone Daphne"