A terrible curse is placed upon his loved ones and he must travel to the Undersea Kingdom in order to free his mother who has been captured by an old foe.

On January 18, 2017, it was announced that Mark Hamill, Christopher Plummer and Jeffrey Combs and Doug Bradley would be joining the voice cast in this animated feature.

[3] Mark Hamill was cast as Dr. Henry Armitage while Christopher Plummer, Ron Perlman, and Doug Bradley reprise their respective roles as Dr. Herbert West, Shoggoth, and Nyarlathotep.

Factory had acquired the distribution rights to the series including theatrical, digital, broadcast, home entertainment.

Critics says [10]"Howard Lovecraft and the Undersea Kingdom does a lot of things right; it’s fun, packed with high adventure, and manages to soften the Lovecraft mythos to make it palatable to younger viewers (...) the story is muddy in some areas with a myriad of story points going on simultaneously over a rather short runtime".