The lives of Scooby and the gang are in danger when Nibiru comes, threatening reality itself.
Guest Cast
Gary Cole
voices Fred Jones Sr.
Lewis Black
voices Mr. E
Udo Kier
voices Professor Pericles
Kate Higgins
voices Janet Nettles
Tia Carrere
voices Judy Reeves
Tim Matheson
voices Brad Chiles
Kath Soucie
voices Nan Blake
Vivica A. Fox
voices Cassidy WilliamsCast Appearances
Frank Welker
voices Fred Jones
Frank Welker
voices Scooby Doo
Matthew Lillard
voices Shaggy Rogers
Mindy Cohn
voices Velma Dinkley
Grey DeLisle Griffin
voices Daphne BlakeEpisode Discussion
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