The scares start in Hawaii, where Scooby-Doo and Shaggy are scarfing down the surf-and-turf menu until a giant serpent tries to swallow them faster than you can say She Sees Sea Monsters by the Seashore. In Uncle Scooby and Antarctica, a friendly penguin invites the Mystery, Inc. crew to visit his polar home, which happens to be haunted by an ice ghost! Then, the gang meets music group Smash Mouth while visiting Australia's Great Barrier Reef to watch Shaggy and Scooby compete in a sand castle contest in Reef Grief! Just when they think it's safe to go back in the water... it isn't.
Frank Welker
as Scooby-Doo / Fred Jones / Motoshondu (voice) (archive footage)
Casey Kasem
as Shaggy Rogers (voice) (archive footage)
Grey DeLisle
as Daphne Blake / Shawna (voice) (archive footage)
Mindy Cohn
as Velma Dinkley (voice) (archive footage)
Jeff Bennett
as Crunchy Granville / Fritz / Mr. Keenan (voice) (archive footage)
Mimi Rogers
as Maura Ravenmane / Helga (voice) (archive footage)
Kevin Michael Richardson
as Sharky Tazo / Stink Eye (voice) (archive footage)
John Stephenson
as Zelig (voice) (archive footage)
Eva Almos
as Captain Corvina Cloyd (voice) (archive footage)
John Gabriel
as Dr. Armand Zola / Worker (voice) (archive footage)
Mikey Kelley
as Monroe Hopper (voice) (archive footage)
Kathy Nagler
as Sergeant Linda Rauch (voice) (archive footage)
