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
Nathan Fillion season of Joss Whedon's series "Buffy the Vampire Slayer". In 2002, Fillion starred as Captain Malcolm Reynolds in the Joss Whedon science fiction television series "Firefly", for which he won the Cinescape Genre Face of the FutureMale award by the Academy of Science Fiction, Fantasy & Horror Films, USA. Fillion also won the Syfy Genre Awards in 2006 for Best Actor/Television and was runner-up for Best Actor/Movie. Fillion called his time on "Firefly" the best acting job he ever had, and compares every job he has had to it. Although the show was cancelled, it was adapted to the big