Johnny meets the Scooby-Doo gang when his car breaks down before he gets to his aunt's house and when he gets to the house Johnny and the Scooby-Doo gang have to find his aunt.
Quest roles:
Heather North(Daphne Blake (voice)), Frank Welker(Barney Rubble / Dino (voice)), Casey Kasem(Shaggy Rogers (voice)), Greg Burson(Ghostly Gardener (voice)), B. J. Ward(Velma Dinkley (voice)), Julie McWhirter((voice)), Arlene Golonka((voice))