The gang goes on a trip to check on Velma's younger sister, Madelyn. She's been studying stage magic at the Whirlen Merlin Magic Academy, where apparently there have been sightings of a giant griffin. The gang decides to investigate.
Not streaming on a subscription service in the US right now.
Starring Frank Welker, Matthew Lillard, Mindy Cohn, Grey DeLisle, Danica McKellar, James Patrick Stuart, Crystal Scales, Brian Posehn, Jeffrey Tambor, Diane Delano