The series was preceded by two television movies, The Night Stalker (1972) and The Night Strangler (1973). While the series only lasted for one season, it remained popular in syndication, and is often credited as the inspiration for the popular television series The X-Files. Following The X-Files' success, the franchise was resurrected in 2005 in the form of a second television series with a new cast and characters, as well as subsequent novels and comic books.