Verticulus was a planet known for its Halloween celebrations. It was home to spider-like creatures that looked like jack-o'-lanterns and three-eyed red-skinned humanoids.
The Eleventh Doctor and Amy Pond once visited Verticulus to experience its Halloween. They encountered two trick-or-treaters dressed as a Dalek and a Cyberman. Amy gave them Jammie Dodgers, but they wanted baby brains instead. Because of this, they covered the Doctor's TARDIS in toilet paper. (COMIC: Wholloween)