The Hawlings came from Miskatonic University, which is located in the fictitious Arkham, set in the real-world Essex County, Massachusetts. This places this episode within the realm of the Lovecraft "Cthulhu" Mythos, created by H. P. Lovecraft, the creator of Arkham and Miskatonic University.
The theme for season 4 is the same as season 3's, but the voice now says "Goosebumps", instead of "Ultimate Goosebumps".
Mark: (Referring to the shrunken head) Mom, it was chasing me. It's alive! Alive!
Mark: Kalia! Kalia!