Grateful Dead's Halloween show at Wembley Arena in 1990 was a memorable night for both the band and their fans. Despite Jerry Garcia's voice being a bit strained, the band delivered a powerful performance that showcased their improvisational skills and timeless music. Highlights included a blistering "Scarlet Begonias" > "Fire on the Mountain" sequence, a soulful "Stella Blue," and a spooky "Werewolves of London" to fit the Halloween theme. The energy in the arena was electric, as fans danced and sang along to their favorite Dead tunes.