Feature films are occasionally created from television series or television segments. In some cases, the film will offer a longer storyline than the usual television program's format and/or expanded production values. During the 1970s, many UK television series were turned into films including "Dad's Army", "On the Buses", "Steptoe and Son" and "Porridge". In 1979, "The Muppet Movie" was a big success. In the adaptation of "The X-Files" to film, greater effects and a longer plotline were involved. Additionally, adaptations of television shows will offer the viewer the opportunity to see the television show's characters without broadcast restrictions. These additions (nudity, profanity, explicit drug use, and explicit violence) are only rarely a featured adaptive addition (film versions of "procedurals" such as "Miami Vice" are most inclined to such additions as featured adaptations) – "" is a notable example of a film being more explicit than its parent TV series.