Thorn

Thorn, the stage name of Sally McKnight, is a rock singer/musician, the leader of the Hex Girls, and supporting character in the Scooby-Doo animated franchise. She is voiced by Jennifer Hale.

TV series

 * What's New, Scooby-Doo?
 * 2.5 "The Vampire Strikes Back"
 * Scooby-Doo! Mystery Incorporated
 * 1.7 "In Fear of the Phantom"
 * 2.10 "Night Terrors" (poster)
 * 2.18 "Dance of the Undead"
 * Scooby-Doo and Guess Who?
 * 1.24 "I Put a Hex on You!"

Movies

 * Scooby-Doo! and the Witch's Ghost
 * Scooby-Doo! and the Legend of the Vampire
 * Scoob! (poster)

Comics

 * Scooby-Doo! Team-Up
 * #50 "Crisis of Infinite Scoobys"

Books

 * Scooby-Doo! and the Witch's Ghost
 * Scooby-Doo! and the Hex Girls
 * Daphne and Velma
 * #1 The Vanishing Girl

Behind the scenes

 * There was also a failed attempt at a Hex Girls spin-off TV series with creator Rick Copp and co-writer David A. Goodman, which occasionally gets revisited.
 * Daphne dressed as Thorn on one Halloween night in the Be Cool, Scooby-Doo! episode "Halloween." Thorn and the Hex Girls would've appeared in Be Cool, Scooby-Doo!, but their episode space was taken up by "Pizza O'Possum's"/"The Curse of Half-Beard's Booty."