Frank Welker

Fred Jones (voice) (archive footage)

Casey Kasem

Shaggy (voice) (archive footage)

Don Messick

Scooby-Doo (voice) (archive footage)

B.J. Ward

Velma (voice) (archive footage)

Heather North

Daphne (voice) (archive footage)

Marla Frumkin

Velma (voice) (archive footage)

Indira Stefanianna

Daphne Blake (voice) (archive footage)