All Cast
Frank Welker
Scooby-Doo / Fred Jones (voice)
Matthew Lillard
Shaggy Rogers (voice)
Grey DeLisle-Griffin
Daphne Blake (voice)
Mindy Cohn
Velma Dinkley (voice)
Mark Hamill
Zip Elvin (voice)
Diedrich Bader
H.A.M. (voice)
Malcolm McDowell
Sly Baron (voice)
Fred Tatasciore
Hudson Baron / Alien (voice)
Jennifer Hale
Shannon Lucas / Ridley / Launch Manager (voice)
Jeff Bennett
Colt Steelcase (voice)
Kevin Michael Richardson
Uvinous "U-Boat" Botango / Drake (voice)
