6.7 Full HDHappy Halloween Scooby-Doo! 2020 Happy Halloween Scooby-Doo! IMDb: 6.7 2020 80 min 937 views Scooby-Doo and the gang team up with their pals, Bill Nye The Science Guy and Elvira Mistress of the Dark, to solve this mystery of gigantic ... AnimationComedyCrimeFamilyMystery