watch 01:24 The Loop (TV) Do you like this video? Jeff Holder is an American writer, producer, production manager, and program executive. He has worked on several Hanna-Barbera productions. Crew credits TV series The 13 Ghosts of Scooby-Doo 108. When You Witch Upon a Star - story by External links Jeff Holder at IMDb Retrieved from "https://scoobydoo.fandom.com/wiki/Jeff_Holder?oldid=251297" Categories: The 13 Ghosts of Scooby-Doo writers Community content is available under CC-BY-SA unless otherwise noted.