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Synopsis
Watch Scooby-Doo! The Mystery Begins (2009) online for free on 123Movies. The story of how Mystery Inc. was formed.
Original title Scooby-Doo! The Mystery Begins
IMDb Rating 5.3 5785 votes
TMDb Rating 6.4 475 votes
Director
Director
Cast
Scooby-Doo (voice)
Velma
Daphne
Shaggy
Fred
Janitor
Principal Deedle
Vice Principal Grimes
Librarian
Dad