|Dates||August 20, 1890 – March 15, 1937|
|Location||Providence, Rhode Island|
|Episode(s)||6.21 Let It Bleed|
Howard Phillips Lovecraft, also known as H.P. Lovecraft, is a horror writer who opened a door to Purgatory on March 10, 1937. A creature that came through killed him five days later. The murdering creature may have been Eleanor Visyak, though she denies murdering him.
Bobby visits a Lovecraft enthusiast, Judah. When he asks about the date that Moishe Campbell visited Lovecraft, Judah tells him about the dinner party Lovecraft held on that day attended by six friends who Judah describes as "ço-worshippers in a black magic cult." They perform a ritual to open a door to an alternate dimension. They think it hasn't worked, but each of them die or disappear within a year. Unbeknownst to them, a creature has come through and possesses Lovecraft's maid Eleanor. Only her 9 year old son Westborough realizes this, and he is not believed but committed to a psychiatric institution.
- Before demons break into their house, Ben Braeden is reading Cthulhu Tales, a series of comics with stories based in the Cthulhu Mythos. The Cthulhu Mythos is a shared fictional universe created in the 1920s by American horror writer H. P. Lovecraft. Cthulhu is a fictional cosmic entity that Lovecraft created in 1926.
- When Bobby is leaving Judah's office there is a game being played on Judah's television, that game is "Cthulhu Saves the World" an independent game made by Zeboyd Games.
- In Sam's subconscious, he pick's up a copy of Lovecraft's 'The Haunter of the Dark', which stimulates a rush of memory 
- Death also refers to the Leviathans as "The Old Ones" a term used by H.P. Lovecraft in the Cthulhu mythos to describe ancient powerful alien beings who come to Earth.
The Real H.P. Lovecraft
- H.P. Lovecraft was a writer of horror and fantasy fiction, who did live in Rhode Island most of his life. While he didn't attain much acclaim while alive, he is now seen as one of the most influential writers of the 20th century. He is most widely known for the Cthulhu mythos, a verse that includes deities who are known as "the Great Old Ones" who once ruled Earth, as well as the Necronomicon, a fictional grimoire.
- H.P. Lovecraft archive
- Cthulhu Lives - the Lovecraft historical society
- Free ebooks of Lovecraft's work on Gutenberg