Happy Halloween, Scooby-Doo! Leave a Comment on Happy Halloween, Scooby-Doo! Posted in Action, Adventure, Animation, Comedy, Family, Fantasy, Horror, Mystery, Sci-Fi, Year – 2020 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 proportions and save Crystal Cove! Trailer: