Science fiction fandom other groups including LGBT communities, libertarians, neo-pagans, and space activist groups like the L5 Society, among many others. Some groups exist almost entirely within fandom but are distinct and cohesive subcultures in their own rights, such as filkers, costumers, and convention runners (sometimes called "SMOFs"). Fandom encompasses subsets of fans that are principally interested in a single writer or subgenre, such as Tolkien fandom, and ("Trekkies"). Even short-lived television series may have dedicated followings, such as the fans of Joss Whedon's "Firefly" television series and movie "Serenity", known as Browncoats. Participation in science fiction fandom often overlaps with other similar
A Hole in the World – was introduced so that when he says Fred cannot be saved, the audience believes it, explains Whedon. This episode was rated as one of the series' top five episodes in a poll done by "Angel Magazine". A Hole in the World "A Hole in the World" is episode 15 of season 5 in the television show "Angel". Written and directed by series creator Joss Whedon, it was originally broadcast on February 25, 2004 on the WB television network. In this episode, Fred is infected by the spirit of Illyria, an ancient demon who existed before recorded time. The entire