watch 01:52 The Loop (TV) Do you like this video? Trey Callaway was a writer for the series Supernatural . Callaway has also written episodes of Mercy Point, W.I.T.C.H., and CSI: NY. He also wrote the screenplay for the movie I Still Know What You Did Last Summer. Writer Season 1 "Hell House" External links IMDB Retrieved from "https://supernatural.fandom.com/wiki/Trey_Callaway?oldid=314846" Categories: Writers Crew Community content is available under CC-BY-SA unless otherwise noted.