Guest Stars Donna Kimball voices Aughra Jason Isaacs voices The Emperor Keegan-Michael Key voices The Ritual Master Benedict Wong voices The General Gugu Mbatha-Raw voices Seladon Mark Hamill voices The Scientist Caitríona Balfe voices Tavra Simon Pegg voices The Chamberlain Harris Dickinson voices Gurjin Neil Sterenberg voices The Scroll Keeper Awkwafina voices The Collector Harvey Fierstein voices The Gourmand Warrick Brownlow-Pike voices Podling Servant #1 Toby Jones voices Librarian Mark Strong voices Ordon Helena Bonham Carter voices All-Maudra Louise Gold voices Maudra Argot Louise Gold voices Podling Servant #2 James Dreyfus voices Lath'N Charlie Condou voices Mitjan Beccy Henderson voices Bobb'N Dustin Demri-Burns voices Daudran Theo Ogundipe voices The Sanctuary Tree Sigourney Weaver voices The Myth-Speaker Alicia Vikander voices Mira