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
Warren Ellis would be writing every episode. In 2006, Ellis was hired to develop a science-fiction television series for AMC titled "Dead Channel", but the project was put on hiatus. The series followed a television network executive who discovers the existence of aliens and decides to turn the discovery into a reality show. "Listener", a near-future science fiction novel, was planned as Ellis' next book after "Crooked Little Vein." The novel has since been lost and cancelled. "Wastelanders", a web-based "end-of-the-world" collaboration with director Joss Whedon, was postponed due to Whedon's work on "The Avengers". Ellis and British producer Vivek Tiwary developed