You will Watch Scooby Doo! Mystery Incorporated Episode 5 online for free episodes with HQ / high quality. Stream cartoons Scooby Doo! Mystery Incorporated 105 The Song of Mystery.The children of Crystal Cove are being turned into monsters by a creature named Que Horrifico scaring all of the adults in town. Velma tries to get Shaggy to stop saying the word “like” so frequently as well as to start wearing new pants. Meanwhile, Fred is getting tutored by an intelligent child who claims she should be in college. As the gang try to stop Que Horrifico, they find themselves trapped in a house for sale at the mercy of the “spookified” children, but escape thanks to a children’s TV program.