The first episode of Scooby-Doo, Where Are You premiered over 50 years ago, and the best Scooby-Doo episodes still endure in the modern day. Hanna-Barbera made a legendary mystery cartoon that would grow up with generations to come. Not only has Scooby-Doo and the gang taught their audience how to face fears, the series always taught them that not every monster is as it seems.