Percival Warthrop
Played by: Alex Morrison
First appeared in: 304: Pet, Cemetery
A clean-cut young man who turns up in New Jerusalem claiming to be related to the Warthrop family, whose estate once stood on the hill above town. Retired constable Robert Morgan does not remember any Percival Warthrop and says the old Dr. Pellinore Warthrop never had a son as far as he knew.
In 304: Pet, Cemetery the investigators approach him in Denny's Tavern. He says he is traveling alone and has come to see whether anything is left of the old estate. He dismisses the Warthrops' "monstrumology" as crazy, but Dr. Simeon can tell he is lying. Up in the group's room he admits that he hunts monsters too, that he grew up in New Jerusalem, and that the creatures were exterminated years ago and should not be back. Asked whether he is thirsty for violence, he answers, "Always, doctor. Always." On night watch, Dom shows him the symbol left behind when his wife and son vanished. Percival identifies it as the mark of the Order of Scorpius and the Devereaux family of witches, warns Dom to let it go, and promises to contact some people he knows. Once Dom goes back to bed, Percival throws the drawing into the fire.
In 305: The Shining... Skin he goes with the group into J.G. Faust's tomb. He identifies the gouges on the stairway as the claw marks of a very large creature and points out that the deaths of the men found below were covered up.
In 306: Cellar Door he is alarmed by the burned laboratory notes, which show the headless creatures that once overran the area. He recognizes the population growth equation on the "parthenogenesis" page and stays in the truck with Simeon and Billy to study the notes while the others search the Russell farm. He describes himself as a "jack of all trades or renaissance man."