Ookla the Mok / Gemini / Rider / Skullos / Vortak / Zet (7 episodes, 1980-1981)
Thundarr / Henchman / Manhat Dweller / Old Eskimo (4 episodes, 1980)
Princess Ariel / Dr. Craft / Manhat Dweller / Mina (4 episodes, 1980)
Narrator (3 episodes, 1980)
Captain Corden / Cinda, Voice of Crystal (2 episodes, 1980-1981)
Mindok The Mind Menace / Muragg / The Old Wizard (2 episodes, 1980)
Tai / Tye (2 episodes, 1980-1981)
Additional Voices / Zevon (2 episodes, 1980)
Ponce (1 episode, 1980)
Straia (1 episode, 1980)
Vashtar (1 episode, 1981)
Artemus, Mutants (1 episode, 1981)
Yondo (1 episode, 1981)
Circe (1 episode, 1981)
Octagon (1 episode, 1981)
Argoth of a Thousand Eyes (1 episode, 1981)
Maya (1 episode, 1981)
Additional Voices (unknown episodes)