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
Joss Whedon would not be brought back for a sixth season. Whedon said of the cancellation, "I believe the reason "Angel" had trouble on The WB was that it was the only show on the network that wasn't trying to be "Buffy". It was a show about grown-ups". An official continuation of the story came rather in the form of a comic book series. Following the successful eighth season of "Buffy the Vampire Slayer", IDW Publishing approached Whedon about similarly producing a canonical sixth season for "Angel". "" released 17 issues written by Whedon and Brian Lynch. Whedon followed "Angel" with the