A cosmic case of flying saucers, intergalactic intrigue and out-of-this-world romance launches Scooby-Doo! and the Mystery Inc., Gang into their most unearthly adventure ever.
Candi Milo
as Crystal / Amber (voice)
Neil Ross
as Sergio / Buck (voice)
Jennifer Hale
as Dottie (voice)
Mary Kay Bergman
as Daphne Blake (voice)
B.J. Ward
as Velma Dinkley (voice)
Jeff Bennett
as Lester (voice)
Audrey Wasilewski
as Laura (voice)
Frank Welker
as Fred Jones (voice)
Scott Innes
as Scooby Doo / Shaggy (voice)
Mark Hamill
as Steve (voice)
Kevin Michael Richardson
as Max (voice)
