After finishing up their senior year of high school, the Scooby-Doo-gang decide to travel in the Mystery Machine, seeking fun and adventure during what could possibly be their last summer break together. However, havoc-wreaking monsters prevent them from completing their journey.
Matthew Lillard | Shaggy Rogers (voice) | |
Grey Griffin | Daphne Blake (voice) | |
Kate Micucci | Velma Dinkley (voice) | |
Frank Welker | Fred Jones / Scooby-Doo (voice) |
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