- Neil Sterenberg - skekOk (The Scroll-Keeper) (voice)
- Awkwafina - skekLach (The Collector) (voice)
- Jason Isaacs - skekSo (The Emperor) (voice)
- Benedict Wong - skekVar (The General) (voice)
- Simon Pegg - skekSil (The Chamberlain) (voice)
- Toby Jones - Librarian (voice)
- Harvey Fierstein - skekAyuk (The Gourmand) (voice)
- Keegan-Michael Key - skekZok (The Ritual Master) (voice)
- Eddie Izzard - Cadia (voice)
- Helena Bonham Carter - All-Maudra (voice)
- Shazad Latif - Kylan (voice)
- Gugu Mbatha-Raw - Seladon (voice)
- Harris Dickinson - Gurjin (voice)
- Lena Headey - Maudra Fara
- Alice Dinnean - sekeEkt (The Ornamentalist)
- Ralph Ineson - skekMal (The Hunter)
- Ólafur Darri Ólafsson - urVa (The Archer)
- Nina Sosanya - Maudra Mera (voice)
- Nimmy March - Maudra Laesid (voice)
- Kemi-Bo Jacobs - Maudra Seethi (voice)
- Beccy Henderson - Maudra Ethri
- Theo James - Rek'yr
- Andy Samberg - skekGra (The Heretic) (voice)
- Bill Hader - urGoh (The Wanderer) (voice)
- April Hughes - Juni (voice)
- Javier Grillo-Marxuach
- Lisa Henson
- Jeffrey Addiss
- Louis Leterrier
- Cameron Richardson
- Daniel Pemberton
- Samuel Sim
Taron Egerton interpreta a Rian (voice) en la serie.
Anya Taylor-Joy hace el papel de Brea (voice).
Nathalie Emmanuel interpreta a Deet (voice) en la serie.
Victor Yerrid interpreta a Hup (voice) en la serie.
Natalie Dormer hace el papel de Onica (voice).
Caitríona Balfe interpreta a Tavra (voice) en la serie.
Donna Kimball interpreta a Aughra (voice) en la serie.
Mark Strong interpreta a Ordon (voice) en la serie.
Mark Hamill interpreta a skekTek (The Scientist) (voice) en la serie.
Neil Sterenberg interpreta a skekOk (The Scroll-Keeper) (voice) en la serie.
Capítulo disponible en las siguientes plataformas:
