Cast
Janet Waldo
as Circe
Nancy McKeon
as Tai
Keye Luke
as Additional Voices
Stacy Keach Sr.
as Additional Voices
Joan Van Ark
as Captain Corden
Rachel Baker
as Additional Voices
Alan Dinehart
as Ponce
Avery Schreiber
as Octagon
Marilyn Schreffler
as Additional Voices
Shepard Menken
as Additional Voices
Michael Ansara
as Vashtar
Robert Ridgely
as Thundarr
Nellie Bellflower
as Princess Ariel
William Woodson
as Argoth of a Thousand Eyes
Chuck McCann
as Artemus, Mutants
Marlene Aragon
as Maya
Dick Tufeld
as Narrator
Alan Oppenheimer
as Mindok The Mind Menace
Michael Bell
as Yondo
Henry Corden
as Ookla the Mok
Julie McWhirter
as Straia
