Frank Welker (Scooby-Doo/Fred), Casey Kasem (Shaggy), Mindy Cohn (Velma), and Grey DeLisle (Daphne). Watch What’s New, Scooby-Doo? Season 2 streaming via HBO Max What’s New, Scooby-Doo?

Splash into action with seafaring sleuths Scooby-Doo and the Mystery, Inc. gang as they collide with a mystery ship and try to uncover clues from a vanished crew in Hassle in the Castle!

Daphne and Fred can’t help but notice how strangely familiar this island is, to a terrifying trip they once took decades ago. Hop on board and travel with Scooby-Doo and the gang, as they ...