People tend to think of the Grateful Dead as a hippie band spreading sunshine and light. While the good vibes are for real, there’s also an otherworldly darkness in throughout their story. For the Halloween edition of Dead to Me, Casey and Ed take a look at everything from the occult ambience in the early scene to the band’s hair-raising improvisations. Special guest Jason George, a longtime taper and horror buff, talks about Jerry Garcia’s love of the macabre and how the Dead embraced the uncanny. Feed Your Head profiles the academics who conducted mass-ESP experiments at six Dead concerts in 1971. Happy Halloween!