Felicia Day is to return to Supernatural in a future episode. The Dr. Horrible's Sing-Along Blog star previously played computer hacker Charlie Bradbury in season seven's 'The Girl with the Dungeons and Dragons Tattoo'. Day will reprise the role of Charlie in season eight's upcoming eleventh episode, 'LARP and the Real Girl', according to TVLine. The actress first announced her Supernatural return on Twitter last night (October 31), writing: "What better place to be on Halloween than on the set of Supernatural? Charlie's back!" The 33-year-old's additional credits include roles on Buffy the Vampire Slayer, House and Eureka.