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
Science fiction on television Cities of Gold" (1982), and "Ōban Star-Racers" (2006). The first Spanish SF series was "Diego Valor", a 22 episode TV adaption of a radio show hero of the same name based on Dan Dare, aired weekly between 1958 and 1959. Nothing was survived of this series, not a single still; it is not known if the show was even recorded or just a live broadcast. The 60s were dominated by Chicho Ibáñez Serrador and Narciso Ibáñez Menta, who adapted SF works from Golden Age authors and others to a series titled "Mañana puede ser verdad". Only 11 episodes were filmed.