The Ghost of the Great Haldane is a villain in "The Sorcerer's a Menace", an episode of Scooby-Doo and Scrappy-Doo. He was revealed to be Morgan the Magician.
Morgan the Magician wanted to steal a black pearl. For that reason, he used the projection of Haldane's ghost so Morgan could have a perfect alibi.
- In Scooby-Doo and the Goblin King, the Ghost of the Great Haldane can be seen in the monster bar.