Sheena Easton
(Professor Fiona Pembrooke
(voice)),
Michael Bell
(Duncan MacGubbin),
Michael Bell
(Duncan MacGubbin /
Mcintyre
(voice)),
Michael Bell
(Mcintyre),
Jeff Bennett
(Del Chillman),
Jeff Bennett
(Del Chillman /
Sir Ian Locksley /
Ha),
Jeff Bennett
(Del Chillman /
Sir Ian Locksley /
Harpoon Gunner
(voice)),
Mindy Cohn
(Velma Dinkley
(voice)),
Mindy Cohn
(Velma Dinkley),
Grey Griffin
(Daphne Blake),
Grey Griffin
(Daphne Blake /
Shannon Blake
(voice)),
Grey Griffin
(Daphne Blake /
Shannon Blake
(voice) (as Grey DeLisle)),
Grey Griffin
(Shannon Blake),
John DiMaggio
(Colin Haggart /
Volunteer #1
(voice)),
Casey Kasem
(Shaggy
(voice)),
Casey Kasem
(Shaggy),
Phil LaMarr
(Angus Haggart /
Volunteer #2
(voice)),
Frank Welker
(Fred),
Frank Welker
(Lachlan Haggart),
Frank Welker
(Scooby-Doo),
Frank Welker
(Scooby-Doo /
Fred /
Lachlan Haggart
(voice))