Juli Murphy

The Spider Queen wants to take revenge on Grim for denying her the rightful place as the Ripper.

The troublesome goat, Ruth wants to fly when Cheryl can too. So she gets advocated by her older brother Beep Boop to use a kite.

Alien werewolves from the Moon attack Earth and steal all the cheese. It's up to Mandy, Grim, Billy, and Sperg to stop the alien ploy.

When the Boogey Man causes Grim to lose his powers, rank, and title in the Underworld Court for misusing his powers, he plots to seek out Horror's Hand and take over the world. It's up to Billy, Mandy, Irwin, and Grim to get to Horror's Hand before the Boogey Man does.

Santa has been turned into a vampire, and only Billy and Mandy can turn him back and save Christmas.

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.