The kids are headed to Barkerville Hall, in Scotland, to figure out what is happening to the Barkerville sheep. Has the curse come true, has the Hound of the Barkervilles come, and is it Scooby, as all the town people believe? / The gang goes to visit Dr. LaRue, an palaeontologist, in San Pablo, Mexico, who excavated a dinosaur that has come to life. The dinosaur is now scaring everyone off, but why, and does it have anything to do with the Lost Silver Mine of Montazuma?