On screen
Cast
13 credited performers
Robert Ridgely
Thundarr (voice)
Henry Corden
Ookla the Mok (voice)
Artwork unavailable
Nellie Bellflower
Princess Ariel (voice)
Dick Tufeld
Narrator (voice)
Keye Luke
Kublai (voice)
Nancy McKeon
Tye (voice)
Alan Oppenheimer
Morag (voice)
Joan Van Ark
Cinda (voice)
Avery Schreiber
Octagon (voice)
Janet Waldo
Circe (voice)
Michael Bell
Yondo (voice)
Chuck McCann
Artemus (voice)
Michael Ansara
Vashstarr (voice)