watch 01:29 Wiki Targeted (Entertainment) Do you like this video? Play Sound John Billingsley is an American actor. He is know for Phlox in Star Trek: Enterprise. Voice roles Scooby-Doo! Mystery Incorporated Character Episode Season 2 Dr. Henklefust 203. The Night the Clown Cried II - Tears of Doom! Retrieved from "https://scoobydoo.fandom.com/wiki/John_Billingsley?oldid=422265" Categories: Scooby-Doo! Mystery Incorporated actors Community content is available under CC-BY-SA unless otherwise noted.