The gang becomes badly entangled in the mystery of an alien thief and rare metals that are going missing from a research lab.
Cast Appearances
Don Messick
voices Scooby-Doo
Casey Kasem
voices Shaggy Rogers
Frank Welker
voices Fred Jones
Heather North
voices Daphne Blake
Patricia Stevens
voices Velma Dinkley
Lennie Weinrib
voices Scrappy-DooEpisode Discussion
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