Billy & Mandy's Jacked-Up Halloween
Jack, a headless prankster from Grim's past, uses Billy to steal Grim's scythe so he can destroy Grim and take over the world with demons from the Netherworld.
- Genre: Animation, Adventure, Comedy, Horror
- Director: Juli Murphy
- Cast: Grey DeLisle, Greg Eagles, Richard Steven Horvitz, Wayne Knight, Vanessa Marshall
- Country: United States