Hellhounds, the fearsome canine beasts of the underworld who often serve as guardians to the very gates of hell, pop up in a wide variety of cultural folklore throughout history. They're also fairly commonplace in the stories we tell in modern times (think Cujo, Ghostbusters, The Omen). Why is that? And what can these legendary hounds teach us about humanity’s relationship with dogs throughout history? (thetvdb.com)