Howard Lovecraft and the Kingdom of Madness is a 2018 Canadian animated film written, directed and produced by Sean Patrick O'Reilly and sequel to 2016 and 2017 films Howard Lovecraft and the Frozen Kingdom and Howard Lovecraft and the Undersea Kingdom. The film was Christopher Plummer's final voice acting role before his death in February 2021. Plot After the events that occurred in the Frozen Kingdom and the Undersea Kingdom, young Howard finds himself at home. The walls of reality are thinning making the world vulnerable to dangers from beyond. Howard follows his father, Uncle Randolph and Dr. Henry Armitage as they journey to Antarctica, to prevent awaking of the destroyer of worlds, Cthulhu. Development Shout! Factory announced their title releases at SDCC '18, which included Howard Lovecraft and the Kingdom of Madness. The Howard Lovecraft series is based on the graphic novel written by Bruce Brown. In an interview with WIRED, the author stated his inspiration came from the writings of American horror author H. P. Lovecraft as well as many of the character and setting names. This is the third and last installment of the trilogy. The final film in the series brings out a creature that "has long been foreshadowed" in the previous installments. Cast Christopher Plummer - Dr. Jeffrey West (Final voice role) Mark Hamill - Dr. Henry Armitage Kiefer O'Reilly - Howard Lovecraft Finn Wolfhard - Herbert West Nick Wolfhard - William Dyer Vijay Vaibhav Saini - Professor Jaswant Atwood Jeffrey Combs - Randolph Lovecraft Doug Bradley - Nyarlathotep Scott McNeil - Hamish Rice Sean Patrick O'Reilly - Spot/Cthulhu Ashleigh Ball - Ellen Ellery Tyler Nicol - Winfield Lovecraft Allison Wandzura - Mary Lovecraft Harmony O'Reilly - Innes Michelle O'Reilly - Sarah Lovecraft Phoenix O'Reilly - Twi'i Summer O'Reilly - Gotha Release The film was released on December 4, 2018. Home media Howard Lovecraft and the Kingdom of Madness was released on DVD and Blu-ray on December 4, 2018 by Shout! Factory which is part of their three feature distribution deal with Arcana Studio. References External links 2018 computer-animated films Animated films based on comics Arcana Studio titles Canadian animated feature films Canadian sequel films Cthulhu Mythos films Films based on Canadian comics Films directed by Sean Patrick O'Reilly 2010s English-language films 2010s Canadian films