Prank Call of Cthulu

"Prank Call of Cthulu" is the sixth episode of the fourth season of the animated comedy series The Grim Adventures of Billy & Mandy, and pits the protagonists against Cthulhu, whose name is spelled as "Cthulu" without the second "h" in the episode. It first aired on October 21, 2005.
The story was conceived by series creator Maxwell Atoms, along with Alex Almaguer, and Mike Diederich. Almaguer and Diederich did the storyboards, and the episode was directed by Russell Calabrese, Juli Hashiguchi, Eddy Houchins, Robert Hughes, and Sue Perrotto.
==Synopsis==
The series' premise is that Billy and Mandy are two children who live in the town of Endsville and have successfully tricked the Grim Reaper into becoming their "friend" or glorified slave. In this episode, Billy wants to send prank calls, but finds that most phones have a caller ID that lets everyone know it's him. Searching in Grim's basement, he finds a mysterious phone, which Grim warns him not to use, as doing so will awaken an ancient monster named Cthulu, who can drive people mad by his mere presence, and who will destroy the world once he awakens from his slumber.
Ignoring the warning, Billy and his friend Irwin try to use the phone to prank call Cthulu, but are grabbed by tentacles that come from inside the phone and transported to the monster's native dimension. Grim thinks the universe is doomed, but Mandy convinces him to go after the boys, so they make a call and find themselves in a world inhabited by eldritch creatures. They soon find that Billy and Irwin have been hired as the new interns at Cthulu's company, where they have already started mutating into tentacled monstrosities. Their job is to make phone calls to the citizens of Endsville, who are likewise turned into monsters by the emanations coming from their phones when they answer them.
While Grim returns to Earth to watch TV, as he doesn't care about the imminent end of the world, Mandy asks Billy and Irwin to take her to Cthulu, who is out playing golf. Using a mirror to avoid looking directly at his madness-inducing visage, Mandy confronts Cthulu, who captures her with his tentacles and tries to eat her. Before he can do so, however, she uses her own phone to call the Phone of Cthulu, which is answered by Grim. She then handles her phone to Cthulu and disconnects the line. Cthulu is sucked inside Mandy's phone and transported to Earth, but Grim smashes the Phone of Cthulu before he can come through, thus trapping the monster between the phone lines with no way to get out.
Freed from Cthulu's influence, everyone who had been transformed reverts to their human forms. However, Billy, Mandy and Irwin realize that they're now trapped in Cthulu's realm with no means to get back. Billy laments that he misses Cthulu and is promptly attacked by an aquatic beast, while Irwin tries to woo Mandy and is rejected. The epilogue shows Cthulu playing golf in the void between worlds, and an end credits scene shows Grim answering a prank call from Cthulu's dimension and being sucked into the phone again.
==Gallery==
PrankCall2.jpg|Cthulu's company, outside
PrankCall3.jpg|Cthulu's company, inside
PrankCall4.jpg|Cthulu
==Trivia==
*The company's name is spelled "Cthulu's" without the second "h", just like the episode's title card.
Category:Expanded Mythos Film & Television
Category:Crossovers